Buy 300ml London Butane Gas Lighter Refills.London butane gas carries the near zero impurities logo which means its the perfect choice for turbo lighters, gas powered soldering irons, hair straighteners, standard lighters, specialist extraction methods and portable gas powered appliances.Buy London gas lighters refills only stock 300ml London Butane Gas as it seems silly to be messing around with small cans and the bigger cans work out cheaper.