BK50118-A Standard V-Belt Pulley, 3L Pitch Diameter Not Applicable, 3V Pitch Diameter Not Applicable, 3VX Pitch Diameter Not Applicable, 4L Pitch Diameter 4 in, 5L Pitch Diameter 4.4 in, 5V Pitch Diameter Not Applicable, 5VX Pitch Diameter Not Applicable, A Pitch Diameter 4 in, AX Pitch Diameter 4 in, B Pitch Diameter 4.4 in, BX Pitch Diameter 4.4 in, C Pitch Diameter Not Applicable, CX Pitch Diameter Not Applicable, Bore Diameter 1 1/8 in, Bore Type Fixed, Standards ISO 9001:2015