Silverado 4000 Outboard Fuel Line is resistant to ethanol blended fuels. This hose is EPA and CARB compliant. Silverado 4000 has a THV barrier layer to prevent permeation, polyester reinforcement for strength and a UV resistant CPE cover. The gray color keeps hose cooler and helps prevent vapor lock. This hose is for above deck primer bulb applications. Not fire retardant. The best B1 fuel line on the market Extremely flexible Easy to clamp Size: 3/8" x 50' MODEL NO - 116-337-0386