The diameter of the trailer bearing dust cover is 1.98 inches, with a total of 4 dust covers and rubber plugs It can protect the trailer axle, grease, and prevent rust from affecting your use. Suitable for: Compatible with Dexter EZ 2000 to 3500 pounds lubricant and standard models The design of the trailer axle cover aims to prevent the trailer axle from being contaminated with dust, preserve lubricating grease, prevent axle corrosion, and serve as a decorative function. The wheel hub grease cover adopts a detachable rubber plug design, which is easy to install and maintain. To ensure a secure installation, the axle dust cover is designed to be slightly larger. You need to use a wooden block and hammer or rubber hammer to knock it into place to prevent damage to the axle dust cover during installation. The design of the trailer axle cover can prevent the trailer wheel hub from being damaged by dust and prevent axle corrosion. It is not only a simple decoration for the trailer, but also helps you maintain the wheel hub. Our product is made of carbon steel, galvanized on the surface, and has excellent corrosion resistance and long-lasting performance. The trailer wheel hub dust cover can keep the wheel running stably in harsh environments or long-distance travel, making it an ideal tool for trailer wheel bearings Performance improvement: Trailer wheel hub covers improve bearing efficiency and service life by reducing friction and heat between wheel components. This reduces the maintenance cost of the vehicle and provides a more reliable towing experience.