The Keg Spacer is a durable plastic disk that enables you to safely stack one Sixtel 'Torpedo' keg (1/6 keg = 5.16 gallons) on top of another Sixtel keg while the design allows both the bottom and top kegs to be tapped. Keg Spacers are an inexpensive way to double the floor space in a cramped walk-in cooler and make storing & stacking kegs easier and safer for employees and distributors. A Sixtel beer keg can weigh as much as 60 pounds. Kegs that are improperly stored, moved or stacked can be extremely dangerous and can potentially cause serious injury. Using good-quality Sixtel keg spacers is a smart investment in your business. There are two size Keg Spacers. This one is to stack standard keg diameters (1/2 Barrels = 15.5 gallons) and Pony kegs (1/4 keg with same diameter as 1/2 barrel = 7-3/4 gallons.) If you are interested in Keg Spacers to stack Sixtel or Torpedo keg diameters (1/6 keg = 5.16 gallons) then type 'Stack!Co Sixtel Keg Spacer' into Amazon search.