Trailer owners, these rubber bumper stops are exactly what you need to keep your cargo trailer in good shape! You get 10 pieces in each pack, which is perfect because these things tend to wear out or get lost over time. Each bumper is 2.5 inches in diameter and 1 inch thick with a 7/16 inch mounting hole. The solid rubber construction is durable and provides good shock absorption when your ramp doors close. They're designed to replace part number OTK20-0275 and work with various cargo trailer models. Installation is straightforward - you'll need your own bolt or screw since those aren't included, but any hardware store will have what you need. The black color blends well with most trailer designs, and the solid bottom (not hollow) means they won't collapse or deform easily under pressure. These bumpers prevent metal-on-metal contact, reduce noise when closing doors, and protect both the door and frame from damage. Whether you're replacing worn-out bumpers or doing maintenance on your trailer, having 10 means you can do multiple doors and keep spares for future needs. The quality is solid for the price - much better than paying dealership prices for OEM parts. For anyone who uses their cargo trailer regularly for business or personal use, these are essential maintenance items that keep everything functioning smoothly and looking professional.