Attwood Primer Bulb - Attwood's exclusive three-layer design ensures high fuel pumping output in hot temperatures (up to 122F ) and cold temperatures (down to 18F) while resisting collapse and hardening. Includes dual high-efficiency check valves that prime in any orientation with low-restriction fuel flow that ensures proper engine operation and aids fuel pump durability. All Attwood portable fuel compoments are designed to exceed OEM engine fuel flow requirements. Prevents fuel evaporation Compatible with Ethanol blended fuels OEM quality and performance at a fraction of the price Compatible with all OEM brand engines Designed to ensure leak free performance EPA and CARB Certified 2-Year Warranty