Small wheel in housing

Small wheel inside of housing. Hardware included Used on: 1SKB-4009BP, 1SKB-4214W, 1SKB-5009BL, 1SKB-5014W, 1SKB-5014Y, 1SKB-5014Y1, 1SKB-5220Y, 1SKB-5820W, 1SKB-5820Y, 1SKB-5820Y1, 1SKB-CV24W, 1SKB-R4215W, 1SKB-R5220W, 1SKB-R6020W, 1SKB19-RSF2U, 1SKB19-RSF4U, 2SKB-4009, 2SKB-4214RC, 2SKB-5009, 2SKB-5014, 3SKB-4212W, 3SKB-4316W, 3SKB-5211W, 3SKB-5216W, 3SKB-6022W