Trailer owners, this ROP Shop grease cap is exactly what you need to keep your bearings properly protected! Measuring 1.98 inches in diameter with a zinc-plated metal construction, this cap is built to handle the elements and keep dirt and moisture out of your hub assembly. The included rubber plug fits 1 3/16 inch diameter openings, creating a tight seal that prevents grease from leaking out and contaminants from getting in. It's designed to work with most 4 and 5 lug hubs on 2,000 to 3,500 lb axles that have EZ Lube spindles - basically, this fits about 95% of all 5 lug axles out there. The installation is straightforward - just press it into place over your hub. The quality is noticeable right away - this isn't some flimsy cheap cap that'll rust or deform after a few uses. Whether you're replacing a lost or damaged cap during routine maintenance or building a trailer from scratch, having the right grease cap is crucial for protecting your wheel bearings and extending the life of your axle components. The package includes one grease cap and one rubber plug, exactly as shown in the product images. Before ordering, double-check your measurements to ensure compatibility, but if you've got standard trailer axles, this is likely the cap you need. It's one of those small but essential trailer parts that can save you from bigger problems down the road. Keep your trailer rolling smoothly with this quality replacement part that does its job without any fuss!