Product Description: This constant velocity driveline is made to exact OEM specifications to fit Jon Deere rotary cutter models CX15 (S/N 005317>) and HX15 (S/N 011945>). Driveline is rated for 540 rpm. Minimum C to C length: 48" (1210) mm; Total collapsed C to C length: 58" (1462 mm). Tractor end: 1-3/8" 6 Spline. Implement end: 1-3/4" 20 Spline. Star style tubing, type B. It may be necessary to cut this driveline to length. Verify the length by ensuring that sufficient overlap of the drive tubes exists in all working positions without the possibility of bottoming out.