Specifications Required 1. Rotary mower working to be 72 inches. 2. Mower to achieve a tip speed of 16,732 F/M. 3. The cutting range is to be 1 to 5 inches in 1/4 inch increments. 4. Rotary mower to incorporate 3 blades. 5. Drive system to incorporate a 540 PTO with ASAE Cat. 3- 1-3/8" spline.