Primer bulb 93038AI7 is alcohol resistant and suitable for use with leaded or non-leaded fuels. The double check valve assures correct fuel flow direction and unrestricted flow. The barb end fuel hose connectors included and attached with stainless steel hose clamps. Check primer bulb and fuel line periodically for leaks, wear or loss of flexibility. Replace as needed. Attwood Corporation has been an award-winning leader in engineering, testing, and manufacturing the highest quality marine products for over 100 years. We deliver safe and reliable lighting, fuel systems, water systems, seating & pedestals, swim ladders, custom upholstery, and general marine accessories that are easy to install and meet regulatory compliance.