Our 1 Inch Engine Fluid Plugs are a practical and reliable solution for preventing dangerous and costly spills. Made of hyper flex polyurethane, these plugs are available in red or black and have a 1 inch diameter. Unlike rubber caps, our hyper flex polyurethane plugs will not swell or deteriorate, ensuring long-lasting performance. Compatible with today's fuels, these plugs fit most makes and models. Please note that these plugs are for plug replacement only, and original metal components must be used during application. Trust our 1 Inch Engine Fluid Plugs for a secure and efficient solution.