Replacement Part Number: 42661VE2800 90651VE2800 42672VE2800 42668VE2800Compatible with HD Model:HRB216K3, HRB216K4, HRB216K5, HRB216K6, HRB216K7, HRM217, HRM217K1, HRM217K2,HRM217K3, HRM217K4 HRM217K5, HRS216 K2. Compatible with 21 Cut Honda:HRB 215,;HRB 216,;;HRB 217, HRM 215, HRR 216,;HRS 216, HRT 216,;HRZ 216This 8 Piece Kit Contains 2 of each of the following part numbers: Gears Repalces Part Number : 42661VE2800, Clips Repalces Part Number : 90651VE2800, Transmission Keys Repalces Part Number : 42672VE2800, Compression Springs Repalces Part Number : 42668VE2800This product use of highquality materials and high resistance to wear and tear. Please Note: Does not fit all specs of above models listed,;please make sure this fits by model, type and serial number of your engine or equipment...If you have a HXA, SDA, SXA, VKA, VLA, or VYA count the teeth on the old gear.;If its 12 then this kit is for you.