Contact Arm, Product Type Contact Arms, Belt Width 5/8 in, 3/4 in, Wheel Material Rubber, Material Rubber, Compatible Tool Series Dynafile, For Use with Mfr Model Number 40320, 40321, 40324, 40326, 40330, Belt Length 20 1/2 in, Includes (2) Bearings, Contact Wheel Assembly, Shaft, Platen Pad Density Hard, Platen Pad Width 3/4 in, Wheel Diameter 3/4 in, Wheel Shape Crowned, Wheel Width 5/8 in