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 - 51". A49K 4LK510 Replaces OEM # for Husqvarna: 575852401 Compatible with Husqvarna: RZ4216 (966455801), RZ3016 (966612301) Riding Lawn Mower 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. 575852401 Aramid Heavy Duty Drive Belt 1/2 x 51 Compatible with Husqvarna RZ4216, RZ3016 Lawn Riding Mower