Description Features: 1. Compatibility: Dust caps fit most standard 2000 to 3500 pounds trailer wheel hubs for both EZ Lube and standard axle types. 2. Function: Trailer axle caps help protect trailer wheels from dust and debris, providing both protection and maintenance support. 3. Strong Sealing: Galvanized bearing dust caps offer rust resistance, reliable sealing, and long-term durability. 4. Anti-Aging: Made of aluminum alloy and rubber, the dust caps are durable, flexible, highly resistant to aging, abrasion, and tearing. 5. Practical Tool: Provides sufficient equipment for daily use or replacement, serving as a practical accessory for trailer maintenance. Specification: Item Type: Trailer Hub Bearing Dust Caps Material: Aluminum alloy, rubber Fits most standard 2000 to 3500 pounds trailer wheel hubs for both EZ Lube and standard axles. Fits standard brake or idler trailer axles for most 4-lug or 5-lug axles with a 1.98-inch diameter cap