size: 20 x 42/43 x 8 Reinforced, suitable for replacing the original sealing rings, body made of Viton, metal frame made of steel, inner edge with Teflon plating Perfectly suitable for replacing the original sealing rings. Can be mounted on the drive shaft and also on the main shaft of the CVT drives. Made of Viton to withstand the highest thermal loads. They have a protective edge with Teflon plating, thanks to this property these sealing rings have a very low coefficient of friction, resulting in fewer friction losses. In addition, they keep the temperature lower and are more durable than standard rings. They are designed for competition motorcycles, but are also perfectly suitable for standard motorcycles.