Full face 10-1/2" diameter clutch disc with a sprung hub for softer engagement. 300 Series organic material for single disc pressure plates. Weighs 4 lbs. 1-1/8 Inch. 26 Spline. 4 Pounds. 10.5 Inch Diameter. Tech Tip:When installing a new clutch, be sure to follow the manufacturer's instructions for correct set-up. You should also replace the pilot bushing/bearing. Tech Tip: To extend the life of your expensive racing clutch you should not use it to load the car on or in your trailer. The amount of slippage this causes is worse than a night of racing. Clutches, Flywheels and release bearings are STRICTLY FACTORY WARRANTY ONLY. Customer must return the unit to RAM for evaluation and inspection. For a full list of warranty information please see our warranty information here