Genuine Husqvarna Blade and drive Belt Side Discharge Models Only This belt fits 42" Side Discharge Deck with old style blade engage with metal bars connecting lever to deck and also fits 36" Side Discharge Models as a Drive belt (older models with a plastic bonnet) P/N 144200, 5321442-00, 5321312-90 , 5310050-86, 5324192-71, Belt for driving the blades 42" Models, Belt for driving the wheels 36" Models This Belt is used as a Transmission drive Belt on Other Models Please Check The Year and PNC Number Of Your Model From The List Below, This Information Will Be On A Sticker Under The Seat Of The Lawnmower YTH170, HFYTH170D, 2000-03, Tractor YTH170, HAYTH170E, 2003-01, Tractor YTH170, HAYTH170D, 2003-01, Tractor YTH150, HFYTH155C, 1999-12, Tractor YTH150, HFYTH155B, 1999-12, Tractor YT150, HEYT150H, 1996-01, Tractor Al so fits Craftsman, Jonsered, Rally, Partner, Weed Eater, Wizard WZ 12B36B 1999, If you are unsure of the belt you require please contact us with the PNC product number of your model.