V-Belt Pulley Bore Type Fixed Bore Material Cast Iron Number of Grooves 1 Bore Dia 3/4 In. Outside Dia 3.95 In. 3L Belt Pitch Dia 3.36 In. 4L A or AX Belt Pitch Dia 3.7 In. 4LA or A Belt Pitch Dia 3.7 In. Fits Shaft Dia 3/4 In. None Bushing Required Construction Web Industry Number AK4134 Keyway Size 0.187 in x 0.093 In. Set Screw Included Yes For Use With 3L 4L A or AX Type V-Belts