Heavy Duty Aramid V Belts. These belts are designed for heavy duty applications like lawn mowers, tillers and any other clutching applications. Belt Size (Outside dimension): width - 1/2", Length - 54". A52K 4LK540 Replaces OEM # for Craftsman: 501161, 1732224SM Compatible with Craftsman: ZTS6000, ZTS7000 and ZTS7500 This belt is NOT OEM belt. The OEM number is just for your help in looking for the belt you need! Please check your OEM# and belt size before ordering. 501161 1732224SM Aramid Heavy Duty Drive Belt 1/2 x 54 Compatible with Craftsman ZTS6000, ZTS7000, ZTS7500 Lawn Riding Mower