This is a piston ring only. You can select the suitable size according to your needs.

Using this piston ring is easy. First, make sure your engine is turned off and cooled down. Then, select the right size piston ring for your engine. Carefully install it in the appropriate place. When using, avoid over - revving the engine to prevent damage to the piston ring. For maintenance, regularly check the piston ring for wear. If you notice any signs of excessive wear or damage, replace it promptly. Also, keep the engine clean to extend the lifespan of the piston ring.