Axle Oil Seal / Troy-Bilt 921-04031Pack Size:1MTD 921-04031, Troy-Bilt 9621, Troy-Bilt 119, Troy-Bilt 921-04031ESF 161-552, Foley/PLP 161-552, Green Line 16002, NHC 282-6929, Oregon 49-051, Prime Line 7-04080, Rotary 8407, Sunbelt SB-8407, Sunbelt B1SB8407Troy Bilt Horse modelsID: .944 ", OD: 1.500 ", Height: .342 "