Belts That Fit: 4L/A , Material: Die Cast , Inside Diameter Exact: 0., 75 V-belt Pulley Phoenix - 5/8 Bore, 5 Diameter Heavy-Duty Steel Pulley 5/8 Bore Pulley V-groove Pulley Phoenix Mfg. V-Groove Drive Pulley, 3.5 Diameter, Tunisia Die Cast Pulley Elevate the performance of your power transmission systems with our robust V-Groove Drive Pulley, a versatile and durable component perfect for a wide range of applications Additional Features: Made of Light-Weight Diecast Works with 4L/A belts, Inside Diameter: 3/4 4-3/4 Inch Dia Splined Bore Steel V-Groove Drive Pulley Replacement for Hustler 603987 Visit the Phoenix Mfg. Store Inside Diameter: Splined Width: 0.72" Belts That Fit: 4L/A Front Side Offset: 0.0625" Back Side Offset There are no set screw holes.