Lippert Rota-Flex Fifth Wheel Pin Box 328329 – 21000 lb King Pin Coupler PD4590AV Approximately 70% lighter than comparable

Approximately 70% lighter than comparable lead-acid batteries

Dimensions: 42"  x 36"  x 9"

factory-matched look commonly found on Grand Design exteriors

including two FIC keys

Built specifically for RV living

Lippert Rota-Flex Fifth Wheel Pin Box 328329 – 21000 lb King Pin Coupler PD4590AV Approximately 70% lighter than comparableThis new Lippert Rota Flex fifth wheel pin box (328329) is a rubberized king pin coupler system designed to improve towing comfort and reduce stress on your RV and tow vehicle. Built specifically to fit Lippert 1621 frames, this heavy duty pin box delivers a 21,000 pound gross weight capacity, making it ideal for larger fifth wheel trailers. The Rota Flex pivoting head design uses a proprietary rubber torsion compound to absorb fore to aft movement,