The Cambridge is a square fire pit that features a Durastone table top specially sealed to resist moisture penetration as well as other weathering effects. The fire pit’s center burner holds alluring lava rocks (included) and flames that burn quietly as you entertain guests. The base of the table features a hidden chamber that holds a 20-lb. LP gas tank. Adjust the heat output to your preference with the internal control knob also located in the table’s base.