FAMILY FEATURES Driven Shaft Mounted, Straight Bore, Double Piston, Air Engaged, Clutch Brakes Open Or Enclosed Design: Open Drive Arrangement: Pilot Mount Bore Size: 0.750 in. Bore Style: Straight Pilot Size: 2.498 0.001 in Pilot Or Drive Flange Bolt Circle Data: 4, 0.250-20 Bolts @ 90 On A 2.498 in. Circle Over All Length: 6.28 in Over All Diameter: 4.50 in Clutch Facing Type: Standard Coefficient Clutch Facing Edge Color Code: Red Brake Facing Type: Standard