Lippert 333960 RV and Trailer Axle Grease Seal 3500LB 1.719" ID 2.565" OD (2 pack) Lippert Components double lip grease seals form a protective barrier between the axle hub and the outside elements Double lip grease seals do a better job at keeping dirt, grime and water from infiltrating the axle grease Lippert Components double lip grease seals protect the axle hub grease from dirt and water infiltration 2 double lip grease seals per package 3,500-pound axle capacity