Upgrade or replace your trailer axle seals with this 4-pack of high-quality unitized grease oil seals, designed to deliver reliable performance for heavy-duty trailer applications. These seals are engineered to fit Dexter 9K and 10K axles, and directly replace OEM part numbers 010-051-00, 10-2875-06, and 10-51. Each seal features a unitized design—combining both the inner sealing lip and outer metal case into a single integrated unit—to help prevent grease leaks and keep out dirt, moisture, and road debris. With an inner diameter (ID) of 2.875" and outer diameter (OD) of 3.880", they provide a tight, secure fit on compatible trailer hubs. Ideal for use in livestock trailers, dump trailers, utility trailers, and other heavy-duty hauling applications, these seals ensure long-lasting protection and reduced maintenance for your trailer wheel bearings. Constructed from durable NBR rubber with a carbon steel case, they are built to withstand heat, friction, and pressure over extended periods. Whether you're performing routine maintenance or upgrading old parts, this 4-pack is a dependable solution to keep your trailer running smoothly on the road.