The RV5 Extended King Pin by PopUp Towing Products adds 10" of new clearance between your truck and 5th wheel trailer for shorter turns in a strong easy to install accessory. 24,000 lbs. Gross Trailer Weight. Long lasting black powder coated finish and 100% complete. An extra ten inches between the rear bumper and the bulkhead of the trailer makes things easier especially if you’re towing with a Short Bed Truck. In most cases the RV5 eliminates the need for a slider or other more expensive options.