Single Aluminum Block - 60mm Sheave Delrin™ sheave ensures smooth operation and a high safe working load. Swivel head may be locked in place to eliminate twisting.  Specifications: Sheave Diameter 2 3/8" (60mm) Thickness 1 3/32" (28mm) Width 2 1/2" (64mm) Length 5 1/32" (128mm) SWL 2250 lbs. (1020kg) Weight 7.4oz (210g) Max Line size 1/2" (13mm) 

Single Aluminum Block - 51mm Sheave Single block with anodized aluminum cheeks. Delrin™ sheave ensures smooth operation with high safe working load. Swivel head may be locked in place to avoid twist.  Specifications: Sheave Dia. 2" (51mm) Thickness 15/16" (24mm) Width 2 1/8" (54mm) Length 4 13/32" (112mm) SWL 1750 lbs. (795kg) Weight 5oz. (142g) Max. Line size 7/16" (11mm) 

Single Stainless Steel Block - 60mm Sheave Delrin™ sheave ensures low-friction and high safe working load. Swivel head may be locked in place to eliminate line twist.  Specifications: Sheave Dia. 2 3/8" (60mm) Thickness 1 3/32" (28mm) Width 2 1/2" (64mm) Length 5 1/32" (128mm) SWL 2250 lbs. (1020kg) Weight 10.2oz (289g) Max. Line 1/2" (13mm) 

Series 75 Core Block™ - Single - Aluminum Rope/Wire Sheave Core Blocks™ are a true all round solution. A tuned 2-stage bearing system provides excellent performance across the full working load range with an integrated thrust bearing feature and the resilience to handle high dynamic or static loads. Acetal sheave, alloy cheeks and stainless fixings complete the durable package. For reliability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing. Universal Bearing Dynamic and high static load performance The Ronstan Universal Bearing incorporates our proven 2-stage bearing system Stage 1 - Under moderate loads, Acetal ball bearings ensure minimum friction. Stage 2 - Under heavy loads, where deformation of ball bearings alone would result in increased friction, a sliding Acetal bearing on a polished stainless steel race takes over, maintaining low friction performance. Additionally the ball bearings are configured to act as a thrust bearing between the sheave and cheeks, preventing the sheave from rubbing on the cheeks and causing friction when the line lead in and out of the block isn't perfect. Particularly important for cheek blocks. Alloy Cheek Plates Block cheeks are manufactured from the highest quality alloy for maximum strength. Material optimisation and the cut-away design minimises weight and allows easy fresh water rinsing of salt and debris from the bearings. Cheek design has been further styled with flaring at the block throat and reduced gap between the cheek and sheave, minimising rope wear. Universal head The head assembly incorporates a brass bearing washer to provide smooth 360™ rotation of the post and shackle. A set screw arrangement allows the head to be locked at 0™ or 90™. Shackles are high quality forged grade 316 stainless steel. Features: Class leading performance and sleek, contemporary styling Excellent dynamic and high static load performance Less than half the friction of the nearest competitor Universal head with full 3-axis articulation Head posts can be locked at 0 or 90 degrees, by using a 2.5mm Hex/Allen Key Central hub hole can be used as a becket take-off or tie-up point Durable alloy Rope/Wire sheave Applications: Ideal for mainsheet, halyard and spinnaker sheet applications on boats to 14M (46') Various control line applications on larger yachts Aluminium sheave which has a deep groove profile specifically made for use with wire Materials: Sheave: U.V. stabilized Acetal Cheek body: Aluminium Alloy Ball Bearings: High compression strength carbon black Acetal Shackle, head post & hub: Grade 316 stainless steel Specifications: Sheave Ø: 75mm(3") Max. Rope Ø: 14mm(9/16") Max. Cable Ø: 8mm(5/16") Pin Ø: 8mm(5/16") M.W.L.: 1,500kg(3,300lbs) B. L.: 3,000kg(6,600lbs) Weight: 432g(15.3oz)

Stand-Up Swivel - Aluminum Block Specifications: Sheave Dia. 2-2/8" (60 mm) Max Line 1/2" (13 mm) Diameter includes urethane base 3-3/8" (86 mm) Height 4-25/32" (120 mm) H2 2-15/32" (63 mm) Fastener Size (4),1/4" RH (6 mm) C/C 1-11/16" (43 mm) SWL 2250 lbs (1020 kg) Weight Alum. 11.7 oz. (332 g) 

60mm Single Aluminum Element Block with Swivel Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s design pairs the minimum amount of metal required to protect the sheave with a proven journal bearing. So size for size, Element is priced significantly lower, than our previously least expensive blocks. Sideplates are hardcoat-anodized to resist corrosion. A tough composite bearing sheave resists corrosion for a long service life. Features: Sheave Ø (mm): 60 mm Sheave Ø (in): 2-3/8 in Maximum line Ø (mm): 14 mm Maximum line Ø (in): 9/16 in Maximum working load (kg): 1100 kg Maximum working load (lb): 2425 lb

60mm Single Aluminum Element Block with Swivel & Becket Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s design pairs the minimum amount of metal required to protect the sheave with a proven journal bearing. So size for size, Element is priced significantly lower, than our previously least expensive blocks. Sideplates are hardcoat-anodized to resist corrosion. A tough composite bearing sheave resists corrosion for a long service life. Features: Sheave Ø (mm): 60 mm Sheave Ø (in): 2-3/8 in Maximum line Ø (mm): 14 mm Maximum line Ø (in): 9/16 in Maximum working load (kg): 1100 kg Maximum working load (lb): 2425 lb

60mm Single Element Block Mastbase with Swivel Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s design pairs the minimum amount of metal required to protect the sheave with a proven journal bearing. So size for size, Element is priced significantly lower, than our previously least expensive blocks. Sideplates are hardcoat-anodized to resist corrosion. A tough composite bearing sheave resists corrosion for a long service life. Specifications: Sheave: 60mm (2-3/8" Max Line: 14mm (9/16") Max Working Load: 1100kg (2425lbs)

Single Stainless Steel Block - 51mm Sheave Single block with stainless steel cheeks. Delrin™ sheave ensures smooth operation and high safe working load.  Specifications: Sheave Dia. 2" (51mm) Thickness 15/16" (24mm) Width 2 1/8" (54mm) Length 4 13/32" (112mm) SWL 1750 lbs. (795kg) Weight 7.1oz (201g) Max Line 7/16" (11mm) 

45mm Single Aluminum Element Fiddle Block with Swivel, Becket & 150 Cam Cleat Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s design pairs the minimum amount of metal required to protect the sheave with a proven journal bearing. So size for size, Element is priced significantly lower, than our previously least expensive blocks. Sideplates are hardcoat-anodized to resist corrosion. A tough composite bearing sheave resists corrosion for a long service life. Specifications: Sheave Ø (mm): 45 mm Sheave Ø (in): 1 3/4 in Maximum line Ø (mm): 8 mm Maximum line Ø (in): 5/16 in Maximum working load (kg): 550 kg Maximum working load (lb): 1213 lb

45mm Single Aluminum Element Fiddle Block with Swivel & 150 Cam Cleat Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s design pairs the minimum amount of metal required to protect the sheave with a proven journal bearing. So size for size, Element is priced significantly lower, than our previously least expensive blocks. Sideplates are hardcoat-anodized to resist corrosion. A tough composite bearing sheave resists corrosion for a long service life. Features: Sheave Ø (mm): 45 mm Sheave Ø (in): 1-3/4 in Maximum line Ø (mm): 8 mm Maximum line Ø (in): 5/16 in Maximum working load (kg): 408 kg Maximum working load (lb): 900 lb

45mm Single Element Block with Swivel Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s design pairs the minimum amount of metal required to protect the sheave with a proven journal bearing. So size for size, Element is priced significantly lower, than our previously least expensive blocks. Sideplates are hardcoat-anodized to resist corrosion. A tough composite bearing sheave resists corrosion for a long service life. Specifications: Sheave: 45mm / 1-3/4in Length: 102mm / 4in Weight: 103g / 3.6oz Shackle pin: 6mm / 1/4in Maximum line: 12mm / 1/2in Maximum working load: 700kg / 1543lb Breaking load: 1400kg / 3086lb

45mm Single Element Block with Swivel & Becket Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s design pairs the minimum amount of metal required to protect the sheave with a proven journal bearing. So size for size, Element is priced significantly lower, than our previously least expensive blocks. Sideplates are hardcoat-anodized to resist corrosion. A tough composite bearing sheave resists corrosion for a long service life. Specifications: Sheave: 45mm / 1-3/4in Length: 121mm / 4-3/4in Weight: 115g / 4oz Shackle pin: 6mm / 1/4in Maximum line: 12mm / 1/2in Maximum working load: 700kg / 1543lb Breaking load: 1400kg / 3086lb

80mm Single Element Block Mastbase with Swivel Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s design pairs the minimum amount of metal required to protect the sheave with a proven journal bearing. So size for size, Element is priced significantly lower, than our previously least expensive blocks. Sideplates are hardcoat-anodized to resist corrosion. A tough composite bearing sheave resists corrosion for a long service life. Specifications: Sheave: 80mm (3-1/8") Max Line: 16mm (5/8") Max Working Load: 2200kg (4850lbs)

40mm Carbo Single Fixed Block Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming.  Features: Sheave Ø (mm): 40 mm Sheave Ø (in): 1-9/16 in Maximum line Ø (mm): 10 mm Maximum line Ø (in): 3/8 in Maximum working load (kg): 220 kg Maximum working load (lb): 485 lb