Polisport chain sliders are perfect replicas of the OEM stock parts, produced in TPU (Thermoplastic polyurethane) to better withstand the friction and abrasion from your bike's chain. Our chain sliders are produced to be durable and to perfectly fit your dirt bike. CHAIN SLIDER - GREEN KAWASAKI KX250F 21-25 KX450F 19-25 KX250X 22-25 KX450X 22-25