Includes (1) Idler Pulley. New, Bulk Packed. Genuine OEM Replacement Part # 587969201. Consult owners manual for proper part number identification and proper installation. Compatible with the following models: Husqvarna: HU775BB, HD775HW, 917370922, 917370923, 917370924, 917370925, 917370933, 917370934, 917370935, 917370936, 917370937 Top performance. Trusted by many. Trusted by many. Customer