The Rota-Flex king pin box uses proprietary rubberized torsion compound to absorb fore-to-aft movement during towing, known as chucking. This innovative design maintains a level fifth wheel and king pin whilst allowing independent pivot between truck and trailer, creating a dramatically smoother ride and protecting your coach structure from stress.

Heavy-duty steel construction with rust-inhibitive powder coating ensures reliable performance under demanding towing conditions. The 2-row horizontal bolt pattern with precise 7.75-inch and 2-inch vertical spacing supports stable mounting on a wide range of trailer platforms.

• 18,000 pounds gross weight capacity
• 26 5/16-inch length, 12-inch width
• Rubberized coupler with king pin and locking wedge included
• Black powder coated steel
• 2-row horizontal bolt pattern
• Dampens road vibration and chucking motion
• Improves ride comfort and equipment protection
• Limited 1-year warranty