Double Lipped Grease Seal for 3,500 lb. 5 Lug Trailer Hubs and Integral Disc Brake Hubs or Drum Hubs. This grease seal has an inner diameter of 1.72", and the Seal's Outer Diameter is 2.565". This Grease Seal outfits all standard 5 Lug 3500lb Hubs.
You can determine which seal size you need for your trailer by measuring the old seal's inside diameter if it's still available, or by measuring the Seal Surface Outer Diameter on your Trailer Axle's Spindle.