These 1-1/2 Inch Engine Fluid Plugs are a practical and reliable solution for preventing dangerous and costly spills. Made of hyper flex polyurethane, they are more compatible with today's fuels compared to rubber caps. Available in red or black, these plugs have a 1-1/2 inch diameter and fit most makes and models. Unlike original rubber caps, they will not swell or deteriorate over time. Sold individually, these plug replacements must be used with the original metal components during application. Ensure the safety of your engine fluids with these durable and efficient plugs.