Item Type: 20T Worm GearMaterial: CopperOE: 717-0528A, 717-0528, 917-0528A, 717-04449, 717-04861, 917-0528, 917-04861, 917-05861Size: Outer diameter: 1-7/8in / 4.76cm, inner diameter: 3/4in / 1.94cm, width: 5/8in / 1.59cm, key slot: 3/16in / 0.48cm, 20 teethFitment:Replacement for CraftsmanReplacement for TroybiltReplacement for Cub CadetReplacement for MTD built snowblowersApplication: Fits in the popular models (but not limited to)31AS62EE599, 31AH55K7504, 31CM53TE599, 31AH53TR756, 31AH5EL9501, 31AH54KG500, 31AH5FPH599, 31BH5EP9563, 31AH5LTT710, 31AM53KE504, 31AH5DL7501, 31AH5LTT756, 31BM5BKE501, 31AH55KH504, 31AH5FKF501, 31AH5DST596, 31AM68PE599, 31AH53TR710, 31AE6FHF552, 31AE6B0H500, 31AH5EKZ897, 31AE6GLF596, 31AH5MLH501, 31AE5KLG513, 31AE6MKH515, 31AE7H8F599, 19A40024100, 31AM5BQ2563, 31AH54LF501, 31DH65KH515, 31AE63KE504, 31BS63EE500, 31AH55LH501, 31AS62ED500, 31AH54KF501, 31AM53KE501, 31AS53TF599, 31AS63BD500, 31BM53LE565, 31AH5ETQ599, 31AH64FG500, 31BM53Q2563, 31AH55LH565, 31AH65KH500, 31AM53LE501, 31AM63KE504, 31AM59SS596, 31AS6BEE516, 31AA6AHE552, 31AE6LKG500, 31BM53K2509, 31AS62EE583, 31AH54KS596, 31AS62BD500, 31AM73TS710, 31BH65KH515, 31AH55K4590, 31AH54K3590, 31AM63KE515, 31CM53K2509, 31AH54Q4563, 31AH6FFG500, 31AH5EP9563, 31AH5DK7897, 31AH5EVV596, 31AH54LF565, 31AH54K3509, 31AH8ESJ506, 31AM63K2509, 31AH8ESJ596, 31AM5CPG599, 31AH5ER9563, 19A40045OEM, 19A40024OEM, 31AH5FK4897, 31BM6BKE515, 31AM6BP2563, 31AH6FV6897, 31AM5BTR596, 31AM56KF504, 31AH55R7563, 31AH55LU596, 31AH57K9504, 31AH54K6504, 31BH64FF500, 31CH54TF599, 31AH74KG506, 31CH54TE599, 31AH74KG504, 31BH5DP8563, 31BS63BD516, 31AM6BKE515, 31AM63KE500, 31AH57TH599, 31DH54TE599, 31AH54L3509, 31AS62N2711, 31BM63P3711, 31AS63EE799, 31BS6BN2711, 31AS53TF799, 31BS62EE799, 31AS6BEE799, 31AS58TF799, 31AM6BO3711, 31AS68SF799, 31AH55R5711, 31AM5BTR756, 31A-3ABD799, 31AS63EF729, 31AS63EE700, 31BM63P3766, 31AM6CP4711, 31AS63EF700, 31AS6AEE799