V-Belt Pulley Bore Type Fixed Bore Material Die Cast Zamak 3 Number of Grooves 1 Bore Dia 1/2 In. Outside Dia 10 In. 3L Belt Pitch Dia 9.55 In. 4L A or AX Belt Pitch Dia 9.85 In. 4LA or A Belt Pitch Dia 9.85 In. Fits Shaft Dia 1/2 In. None Bushing Required Construction Spoked Set Screw Included Yes For Use With 3L 4L or A Type V-Belts