2AK30 1" Bore Solid Sheave Pulley with 2.95" OD , Hex set screws for V-belts size 4L, 3L 2AK30-1" (OD 3" - ID 1") Outside diameter: 2.95" inch Bore: 1" inch Belt section size: 4L, 3L 2 Grooves One pulley Hex set screws Cast Iron