A grease seal like the part # GS-2250DL would be your best option if that is the size you need. You can go to an oil seal like with the Unitized Oil Seal for Trailer Hubs # 10-63 which is same size and it would work but it's not going to be considerably more effective or reliable than a grease seal. It might be a little bit better in how it would work out but the price is much higher. view full answer...