2.72" Trailer Axle Dust Cap with Rubber Plugs Package Include: 4pcs 2.72 inches trailer axle covers 4pcs extra rubber plug Dimension: OD: 2.72 inch/ 69.1 mm Material: Metal, Rubber Color: Silver Tone, Black Fitment: Fit most standard 7000 - 8000 lb trailer wheel hub for both types of axles EZ Lube and standard; wide compatibility with 8 on 6.5” trailer axles Fit for Trucks, pickups, trailers, RVs or fishing boats, sailboats, etc. Trailer Axle rubber plugs with good elasticity high toughness and anti-seawater resist chemicals resist oil,maintaining excellent aging resistance Trailer bearing dust cap is equipped with a detachable rubber oil plug, which is convenient for installation and maintenance and saves installation time. For a secure fit, the trailer axle grease cap is designed to be slightly larger, and you'll need to tap it into place with a hammer or rubber mallet to avoid denting the cover during installation