Check the listing for details. Reconditioned 4 lb. Steel CO2 Cylinder with CGA320 Valve for Homebrew Kegging. Color: Gray, Condition: Used. Listed at 45.95 USD. 4 lb. Steel CO2 CylinderReconditioned Reconditioned 4 lb. Steel CO2 Tank CGA320 Valve Installed Fresh Hydro-Test Description This pre-loved, perfectly sized, reconditioned, heavy duty 4 lb. steel carbon dioxide cylinder has plenty of life left. This has undergone re-certification within 24 months of shipment and has been jazzed up with a fresh coat of rust-resistant, durable gray paint. It offers a variety of uses, from homebrew, soda or Kombucha tea, to hydroponics, industrial, and aquarium. This cylinder meets all required Department of Transportation specifications and is DOT approved. All cylinders ship empty. Due to differences between manufacturers, cylinder height may vary by as much as +/- several inches and may have a flat bottom and wide neck for screw-on dome, or a four-point stable bottom (similar to a pop/soda bottle). Please check with local filler for their filling requirements prior to purchase. Features High-Quality Construction Heavy-duty steel Valve Installed CGA320 Rust ResistantDurable gray painted finish Applications Beverage, industrial, hydroponic, aquarium Specifications Dimensions 4" diameter x 19.75" height (including valve) Weight Approximately 11 lbs. Service Pressure 1800 PSI Test Pressure 3000 PSI Recertification 5 Years Thank you and cheers!Beverage Elements