1. Applicable Model: The trailer hub bearing dust cap is fit for Vortex hubs with 5 bolts, suitable for boat, engineering, trailer and other hub kits. Please confirm whether it is consistent with the product you need. 2. Part Number: The part numbers for reference are 81143, 48355V. Please confirm whether it is consistent with the Part Number you need to avoid wrong buying and other problems. 3. O Ring Design: The trailer wheel hub dust cap cover is equipped with an O ring, can be firmly fixed on the hub to avoid pollution and debris entering the inside of the hub. 4. Threaded Cap: The threaded cap design makes it easy to remove and install, and the installation and removal process can be completed without additional tools. 5. Durable Material: The trailer axle hub dust cap is made of durable and reliable material, high strength and wear resistant, having long service time. Item Type:Trailer Hub Bearing Dust Cap Part Number:81143, 48355V Fitment:Fit for Vortex hubs with 5 bolts, for Boat, Engineering's, Trailer and Other Hub Kits Name:Trailer Hub Bearing Dust Cap Colour:Black Material:Plastic Package Contents: 2 x Trailer Hub Bearing Dust Cap Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.