Constructed with THV barrier layer to prevent permeation, polyester reinforcement and CPE weather and UV resistant cover. EPA and CARB compliant. Hose construction is easy to rig, clamp and maintains flexibility under a range of extreme environmental conditions. Gray color keeps hose cooler to help prevent vapor lock. For use in above deck primer bulb applications. Resistant to ethanol blend fuels. Not fire retardant. Meets SAE J1527 Type B1-15 requirements.