Contact Arm, Product Type Contact Arms, Belt Width 1/4 in, 1/2 in, Wheel Material Rubber, Material Steel, Compatible Tool Series Dynafile, For Use with Mfr Model Number 40320, 40321, 40324, 40326, 40330, Belt Length 18 in, Includes (2) Bearings, Shaft, Contact Wheel Assembly, Platen Pad Density Not Applicable, Platen Pad Width Not Applicable, Wheel Diameter 1 in, Wheel Shape Wide, Wheel Width 3/8 in