John Deere Original Equipment V-Belt – M172963 Specification – Belt Section: HB Effective Length: 169.724IN Width: 0.673IN Thickness: 0.437IN Angle: 40 Material Spec: ARAMID Fits the following John Deere models: Z535M, Z540M, Z540R. This is a OEM John Deere part. John Deere Original Equipment V-Belt – M172963.