Variable Pitch V-Belt Pulley Bore Diameter 1 3/8 in For Belt Trade Size 4L 5L 5V 5VX A AX B BX For V-Belt Type Banded Classical Cogged Wedge Material Cast Iron Maximum Pitch Diameter 6.3 in (4L A) 6.6 in (5L B) 7 in (5V) Number of Grooves 2 Outside Diameter 7.1 in 3L Pitch Diameter (Maximum) Not Applicable 3L Pitch Diameter (Minimum) Not Applicable 3V Pitch Diameter (Maximum) Not Applicable 3V Pitch Diameter (Minimum) Not Applicable