This is a brand new Kawasaki piston ring set with part number 13025-026 for G4 KV G4TR KV100 motorcycles. The set is an original OE product and is compatible with Kawasaki motorcycles. The set is sized at O/S .020 and is suitable for use in the specified models. This product is a great addition to your motorcycle if you are looking for a reliable and durable piston ring set. box10