Replacement 64mm Dust Cap Seal Ring for Sealed 1,500 lb Knott 5 Lug Hubs

This is a rubberized dust cap seal ring specially designed for Knott Dust Caps that are used on their 1,500 lb Sealed 5 Lug Boat Trailer Hub with Sealed Bearing Cartridges. The o ring is used with the Zinc Plated Dust Cap 64mm for Sealed 1,500 lb Knott 5 Lug Hubs and allows the caps to completely seal and waterproof the hubs from any intrusion. The Knott sealed hub is commonly seen on smaller boat trailers, jet ski trailers, and PWC trailers manufactured by Karavan, Magic Tilt, EZ Loader, and others.