(Pack of 4) Trailer Wheel Unitized Oil Seals WPS (TM) CR27438 91030 Hayes #99 Spindle I.D. 2.750'' for 9K-10K lb. Axles Dimension: I.D. 2.750'' x O.D. 3.779'' Type: Unitized Oil Seal Use with 9,000-10,000 lb. Hayes #99 Spindles Axles Seal Cross Reference: Chicago Rawhide CR27438, Hayes 091030, National B370352BG, Transcom OB27377 Package: 4 pieces