From the product description, check product page for current description, price and availability:

A new 5 lb CO2 tank is one of the required purchases when you’re changing over from bottling to kegging your beer.

This brand new 5 lb aluminum CO2 tank ships free in the 48 contigous states. Aluminum tanks will never rust, which is why we prefer them over steel tanks. The capacity refers to the amount of compressed (liquified) CO2 the tank can hold. 5 lbs of CO2 is enough to dispense 8 to 9 5-gallon kegs of homebrew.

All new CO2 tanks are shipped empty and will require either filling or exchanging for a full tank. Most local homebrew shops will stock gas to exchange, and many local welding supply companies can fill tanks on site.

CO2 tanks should always be stored in an upright position.

Dimensions: 14.33″ Tall x 5.25″ wide.

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