CV Axle, ECCPP for Polaris Sportsman 250/400/425/500 Front Left/Right 1 PC Complete Driving Shaft Assembly Fitment - Fitment for Polaris Sportsman 250/400/425/500 Replacement for OE part - Design to replace OE part, made to meet or exceed OEM standard. Fit and perform as the OE part does. Ideal replacement for OE part at much lower cost while exact same fit and function Shaft - Manufactured with premium material, durable Cr-Moly steel shaft provide smooth and stable driving in all driving condition. Efficiently convert power from engine to wheel Boot - Neoprene boots covers the housing closely, leaving no gap, ensures no leaking of grease and no sand or water could enter the housing parts. Neoprene is also chemical resistant and elastic, which could maintain for a long time Grease - Assembling with special grease that contains molybdenum disulfide, which contributes reliable performance even under the high-temperature condition