John Deere Original Equipment Idler - AH77172.
PULLEY ASSY-4.00 OD .500.
Specification -
Belt Section: HB
Effective Diameter: 4.000"
Groove Width: 0.500"
Angle: 35
Bore Size: 0.512"
Material: STEEL
Fits the following John Deere Combines: 3300, 4400, 4420, 6600, 6602, 6620, 6622, 7440, 7700, 7720, 7722, 8820. This i san OEM John Deere part. Thanks for looking!