Variable Pitch V-Belt Pulley, Bore Diameter 1/2 in, For Belt Trade Size 3L, 4L, 5L, A, B, For V-Belt Type Classical, Material Zinc, Maximum Pitch Diameter 2.60 in (3L), 3.10 in (4L), 3.20 in (5L), Number of Grooves 1, Outside Diameter 3.25 in, Set Screw Location Not Applicable, 3L Pitch Diameter (Maximum) 2.6 in, 3L Pitch Diameter (Minimum) 1.8 in, 4L Pitch Diameter (Maximum) 3.1 in, 4L Pitch Diameter (Minimum) 2.1 in, 5L Pitch Diameter (Maximum) 3.2 in, 5L Pitch Diameter (Minimum) 2.4 in