attwood Primer Bulb Attwood primer bulbs for easy replacement on any portable fuel line. Made to the highest quality standards. Alcohol resistant, suitable for use with leaded and non-leaded fuels. Primer bulb is injection molded for strength and durability. Double check valve for quick priming and unrestricted flow. Non-corrosive, galvanized hose clamps. Low Permeation Perfect for lap swimming or any water activity