Patio Gas Cylinders are mainly used for Barbecues and Patio Heaters. Calor Patio Gas is available in two sizes. 5kg and 13kg. Both feature a 27mm clip on valve. Most Patio Gas Cylinders feature a handy gauge to give you an idea of how much gas is in the cylinder. Patio Gas is available to buy here at The Gas Centre. Use our post code checker to see whether we can deliver to you.