Choose the type of pressure valve in accordance with your  ability to purchase gas cylinders. If you have a local supplier of S30 gas, then choose these, if not, and you have to buy  “Sparklets” type 8gm bulbs, then choose the pin valve type.Forty pint capacity barrel with a good sized neck which makes it easier to clean and re-use. A pressure valve is included with the barrel.. Height 46cm, width 35cm. Beer capacity 40 pints.