2AK41 Solid Sheave Pulley - 3/4" Bore - Double Groove - 4" OD - Fits 4L, A, AX & 3L Belts2AK41 Solid Sheave Pulley 3 4" Bore Double Groove 4" OD Fits 4L, A, AX Belts This solid cast iron 2AK41 sheave pulley features a 3 4" bore and a 4" outside diameter, designed for use with V belts in sizes 4L, A, and AX. With two grooves, a built in keyway, and hex set screws, it's a reliable fit for both inch and metric shafts in HVAC, agricultural, and industrial setups. Outside diameter: 4" (3. 95" actual OD) Bore size: 3 4" inch Groove count: 2