Texas Pneumatic Tools sleeve bushings are mechanical elements that use metal, plastic or fibre-reinforced composite sleeves to reduce vibrations & noise and improve efficiency by reducing friction between moving parts in machines. These bushings serve as an interface between two mechanical parts, act as a buffer and absorb some of the energy produced by the interaction of two parts. They also limit the size of the opening, resist abrasion and act as electrical insulators. Choose from a wide range of these sleeve bushings, available in 7/8 x 3-1/4 and 7/8 x 4-1/4 inch sizes.