Premium NSF Columns All columns are styrofoam insulated to prevent sweating Includes: Faucets 3/16" beer lines Tail pieces Hex Nuts & Washers Faucet Knobs Not Included Glycol Cooled Glycol Columns have a 3/8" Diameter Copper Loop fitted with 3/8" Barbed Ends Diameter: 3" Faucets: 1 Cooling: Glycol H