Polisport chain guides are perfect replicas of the OEM stock parts, produced in TPU (Thermoplastic polyurethane) to guarantee better resistance to abrasion and impacts. Our chain guides are produced to be durable and to perfectly fit your dirt bike. Why Polisport chain Guide plastic parts are the best choice for your Dirt Bike? Injection-molded, quality plastic components with a perfect OEM fit. Exact replica of stock OEM plastic components but stronger Inexpensive alternative to OEM replacement parts. Stock color match Resistant to impact and abrasion Produced in TPU (Thermoplastic polyurethane) Tougher than stock chain guides Packaged in a printed plastic bag