Pneumatic 4-Wheelers on 25, 32 and 42-gallon Tote-Along (16-gallon has heavy-duty wheels) for compatibility with any size RV holding tank. Equipped with 3” waste valve to empty tank eliminate heavy lifting to. Constructed of blow-molded polyethylene and zinc plated steel. Double wheel, front-swivel design for easy pulling and maneuvering.  All 4-Wheelers come completely assembled with a steel tow bar, 3” x 5’ sewer hose with two 3” bayonet hose adapters, 3” bayonet caps (2), 12” rinse hose, ¾” hose cap, cotterless hitch pin, and one Bobber Gauge Full Tank Indicator.  Two-year warranty. Made in the USA.