Product Description: Constant Velocity Tractor Half Shaft. C-to-C Length: 48" (1210 mm), Tractor end: 1-3/8" - 21 Spline. Tube Style: B. Size: 2580. Replaces: Walterscheid No. W2580TR121002. NOTE: It may be necessary tocut this driveline to length> verify the length buy ensure the sufficient overlap of the drive tubes exists in all working positions without the possibility of bottoming out. Fits Walterscheid WWE &WWZ Series: 2580. It may be necessary to cut this driveline to length. Verify the length by ensuring that sufficientoverlap of the drive tubes exists in all working positions without the possibility of bottoming out.