HKANT40K916RHS77 Box Type: 8" K-2, Pivot Connection: N- Narrow, Beam Profile: T Top-Mount, System Capacity: 40K - 40,000 LBS. Box Duty: Standard, Axle Centers: 9 - 49.0" Ride Height: 16R, Axle Wall: NS, Slider Box Width: 77- 42"