1812 Flex-Wing Rotary CutterCutting Width: 12-feet Cutting Capacity: 1-1/2-inch diameter Minimum Tractor HP: 50 to 75 PTO1815 Flex-Wing Rotary CutterCutting Width: 15-feet Cutting Capacity: 2 1/2-inches diameter Minimum Tractor PTO HP: 602215 Flex-Wing Series Rotary CuttersCutting Width: 15 ft. Cutting Capacity: 3 1/2″ diameter Minimum Tractor HP: 60 PTO2810 Single Flex-Wing Rotary CutterCutting Width: 10-feet 6-inches Cutting Capacity: 4-inches diameter Minimum Tractor HP: 60 PTO2814 Flex-Wing Rotary CutterCutting Width: 14-feet Cutting Capacity: 3-inches diameter Minimum Tractor HP: 90 PTO2815 Flex-Wing Rotary CuttersCutting Width: 15-feet Cutting Capacity: 4-inches diameter Minimum Tractor HP: 60 PTO2820 Flex-Wing Rotary CutterCutting Width: 20-feet Cutting Capacity: 3-inches diameter Minimum Tractor HP: 90 PTO3810 Single Flex-Wing Series Rotary CuttersCutting Width: 10-feet 6-inches Cutting Capacity: 4 1/2-inches diameter Minimum Tractor HP: 60 PTO3815 Flex-Wing Rotary CuttersCutting Width: 15-feet Cutting Capacity: 4 1/2-inches diameter Minimum Tractor HP: 60 PTO4815 Series Flex-WingCutting Width: 15 ft. Cutting Capacity: 4.5 in. diameter Minimum Tractor HP: 70 HP