Replacement OEM quality Series 8 Heavy Duty PTO shaft with with 1-3/8" X 6 spline quick disconnect (Metal Pull Collar) yoke on tractor end and 1-3/4"- 21 spline yoke for the implement side. Overall length is 48.5", safe extended length 73" 1-3/8" Diameter X 6 Spline Tractor End Yoke with Metal Collar Quick Disconnect 1-3/4" Diameter X 21 Spline Implement End Yoke 48.5" Overall length Collapsed, Safe Extended Length 73" Standard Series 8 PTO shaft with fine splined Tubing Heavy Duty Series 8 fits most larger mower applications, rated 145hp @1000 rpm and 91hp@540 rpm. We sell many replacement parts for the most manufacturers rotary cutters. If you don't see the parts you need listed please contact us we would love to earn your business. We are listing new items frequently so please check our store often. Part Numbers:BX8980A-SPL We stock a wide variety of replacement parts for Agricultural Equipment please contact us if you have any questions or if you would like more information.