Fifth Wheel Trailer Hitch Pin Box; Rota-Flex ™; King Pin Coupler; 19000 Pound Gross Weight Capacity; Rota-Flex Pin Box; Fits Lippert 1116 Frame Only Rota-Flex™ is a pivoting head pin box that utilizes a proprietary rubber comPound in a compression application to absorb the transfer of fore to aft motion, otherwise known as “chucking.” This innovative design allows the fifth wheel and king pin plate to remain in a horizontal position while the vehicle and trailer pivot independently of each other. Type: Rota-FlexCoupler Type: King PinGross Weight Capacity: 19000 PoundLength: 23-1/4 InchWidth: 12-1/2 InchBolt Pattern: 3 RowHorizontal Mounting Bolt Spacing: 8-3/4 InchVertical Mounting Bolt Spacing: 2-1/2 InchColor/ Finish: Black Powder CoatedMaterial: SteelWith King Pin: YesWith King Turret: YesWith King Pin Locking Wedge: YesWith Turret: NoWith Spacers: No