4 Roller Design10 in. Travel Fore-And-AftWorks With Full Size And Compact TrucksPro Series Fifth Wheel Slider Unit w4 Rollers for 15K 16K 20K Head Assemblies Features. 4 Roller Design. 10 in. Travel Fore-And-Aft. Works With Full Size And Compact Trucks. Fully Adjustable With Trailer AttachedSpecification. Weight - 61.4000. Compatibility - 15K 16K And 20K Head Assemblies. Finish - Powder Coated. Color - Black. Material - Steel