JMTAAT RV Bumper Mount Tote Tank Carrier Secure Tank in Place l Fits Camco Rhino Description Securely holds your tote tank onto standard RV bumpers, also includes straps to secure your tote tank in place. Offer maximum durability. Made of high quality Steel. Industrial grade black powder coating. Fitment Holds all four Rhino Tote Tank sizes (15, 21, 28 and 36 gallons) and is also compatible with most portable waste holding tanks on the market. Fits 4" and 4-1/2" bumpers, ideal for RVs without ladders.