Made of high quality stainless steel ,good durability, not easy to age, there is also a matching rubber trailer hub caps.
This trailer bearing measures 2.717 at its base. It is designed to be used in most 8 bolt hubs.
Trailer Bearing put a small amount internal pressure in the hub (about 3psi). When the hub is submerged water cannot enter the hub because of this pressure.
If your trailer is often in a saltwater environment or needs to be driven on the highway for a longer period of time, then this trailer partner bearing protector is vital for the bearings.