Speedway motors winter performance replacement grand national hub seal and o-ring, seal the drive flange to the hub, .375 inch seal thickness, 3 inch i.d. and 3-3/4 inch o.d.
Replacement seal is for the winters grand national hubs seal has a thickness measuring .375" i.d. measures 3" and the o.d. is 3-3/4" o-ring .139 x 3.859 i.d. seals the drive flange to the hub
