2AK25 1-1/8" Inch Bore 2 Grooves cast iron Solid Pulley with OD 2.5" inch ID 1-1/8" Inch for V-belts size 4L, 5L 2AK25 1-1/8" Inch Bore 2 Grooves Cast iron Solid Pulley with OD 2.5" inch ID 1-1/8" Inch for V-belts A size 4L, Outside diameter: 2.5" inch Bore: 1-1/8" inch Belt section size: 4L 2 Grooves One pulley Hex set screws keyway : 3/16 X 3/32 2AK25 1-1/8"