Fifth Wheel Trailer Hitch Pin Box; Flex Air ™; King Pin Coupler; 18000 Pound Gross Weight Capacity; M15 Air Ride Pin Box; Fits Lippert 0719 Pin Box; Medium Tow Trailair® Was First To The Market With Air Ride Technology For Fifth-Wheel RVs And Still Leads The Way With Innovative Fifth-Wheel Pin Box Technology. Our New Flex Air Pin Box Combines Our Time-Tested Trailair Air Ride Technology With Our Rota-Flex® Pivoting Head To Significantly Reduce Fore To Aft Movement And Vertical Tug-Of-War Between A Fifth-Wheel RV And Tow Vehicle! Type: M15 Air-RideCoupler Type: King PinGross Weight Capacity: 18000 PoundLength: 23-3/16 InchWidth: 12 InchBolt Pattern: 2 RowHorizontal Mounting Bolt Spacing: 7-3/4 InchVertical Mounting Bolt Spacing: 2 InchColor/ Finish: Black Powder CoatedMaterial: SteelWith King Pin: YesWith King Turret: YesWith King Pin Locking Wedge: YesWith Turret: NoWith Spacers: No