Be sure your fuel system is safe; ratchet feature ensures a proper seal while the tether prevents cap loss. Very versatile; designed for 0 to 350 horsepower engines. 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.