Application: Rear Axle Drive Shaft CV Compatible with 2019 Yamaha YXE85 Wolverine X2, 2020 2021 Yamaha YXE85 Wolverine X2 R-Spec XT-R, 2018-2021 Yamaha YXF85 Wolverine X4, 2018-2019 Yamaha YXF85 Wolverine X4 SE, 2020 2021 Yamaha YXF85 Wolverine X4 XT-R, 2019 Yamaha YXE85 Wolverine X2, 2020 2021 Yamaha YXE85 Wolverine X2 R-Spec XT-R Superior Design: All front wheel bearing cv axle are made with heavy-duty 4340 chromoly steel for superior strength and longevity. 40CR Steel; Boot Materia: High quality Neoprene 40% and Nitrile Rubber 60% OEM: BG4-2530T-00-00 BG4-2531H-00-00 Field Tested: All components are precision machined to ensure smooth articulation and plunging to avoid friction that lead to access heat.Neoprene boots for quality protection from extreme hot or cold temperatures Specifications: Package Dimensions 31 x 5 x 5 inches. Compressed Length (mm): 701; Outer Joint Splines: 27T; Outer Joint Compressed Length (mm): 128.9; Inner Joint Splines: 27T; Inner Joint Compressed Length (mm): 78.1 Note: lease choose the right one for your ATV/UTV according to the Amazon model list, and we can offer a 12-month service with a fast 24-hour response! If you have any questions about the axle, please feel free to contact us Rear Axle Drive Shaft CV Axle Compatible with 2019-2019 Yamaha YXE85 Wolverine X2, 2020-2021 Yamaha YXE85 Wolverine X2 R-Spec XT-R, 2018-2021 Yamaha YXF85 Wolverine X4, 2018-2019 Yamaha YXF85 Wolverine X4 SE, 2020-2021 Yamaha YXF85 Wolverine X4 XT-R, 2019 Yamaha YXE85 Wolverine X2, 2020-2021 Yamaha YXE85 Wolverine X2 R-Spec XT-R BG4-2530T-00-00 BG4-2531H-00-00