Each Kit Contains, One Stamped End Ring, One Rubber Super-Ride Bushing And Two Metal Sleeves. This Kit Uses A 2.25"Od X 2" Wide End Ring With A 2.625" Oal Sleeves And Accepts A 9/16" Bolt. Rubicon Express Super-Ride Bushings Are Made From PTMeg Or Polytetramethylene Ether Glycol. This Material Has A 88A Durometer Rating And Is The Toughest Most Durable Bushing Material Available Commercially. These Bushings Are Easy To Install, Lubricate And Service Out On The Trail. The PTMeg Bushings Proven Flexible Design Will Increase Performance Dramatically, Provide Durability And Control, All Without Sacrificing The Extreme Articulation Rubicon Express Customers Have Come To Demand. Rubicon Express Is So Confident In The Toughness Of Their Bushings They Are Covered Against Failure By A Lifetime Warranty