Rotary Mower Driveline Assembly, size 5. Driveline minimum C-to-C is 34" (867 mm), maximum C-to-C length is 51" (1300 mm), total collapsed length is 42" (1067 mm). Tractor ends: 1-3/8" 6 Spline and implement ends are 1-3/8" round bore with 1/2" pin hole. Driveline rated as category 4 (47 hp). Fits Bondioli & Pavesi applications.