Blade support hub Compatible with HUSQVARNA lawnmowers FOR MODELS: R13C5, R213C, R215TX, R216, R216 AWD, R318, R320 AWD, RIDER 11C, 11R, 13, 13AWD, 13C, 15C, 16C, 16C AWD CHARACTERISTICS: Shaft diameter: 20 mm Insertion depth: 15 mm Reference code: 22-747 Original code: 544 06 49-01 HUSQVARNA