7/8 to 3-1/2 Quick Detachable Bushed Bore 4 Groove 20.40 OD
4 in, CX Pitch Diameter 20.Standard V-Belt Pulley, 3L Pitch Diameter Not Applicable, 3V Pitch Diameter Not Applicable, 3VX Pitch Diameter Not Applicable, 4L Pitch Diameter Not Applicable, 5L Pitch Diameter Not Applicable, 5V Pitch Diameter Not Applicable, 5VX Pitch Diameter Not Applicable, A Pitch Diameter Not Applicable, B Pitch Diameter Not Applicable, AX Pitch Diameter Not Applicable, BX Pitch Diameter Not Applicable, C Pitch Diameter 20.4 in, For Bushing Type Quick Detachable.