The Kargo Master 4 Bottle Freon Tank Rack is designed to hold 4x 30Lb Non-refillable/Refillable/Recovery Freon Tanks UP TO 9.75″ in Diameter. The Freon tank rack are built with heavy-duty 1/4″ steel bar and 4 tiers of 14 gauge metal shelf plates for superior structural integrity. Each tier is slightly tilted backward, allowing Freon tanks to be cradled securely inside the tank rack. The Freon Tank Rack is designed to minimize the width (ONLY 10.5″ Wide!!) and maximize storage by allowing the Freon Tank Rack to sit side by side next to each other. Nylon straps are included to strap in and prevent the tanks from falling out.