Looking for a propane gas canister? I Gas Direct can help. If you are looking for a go system butane propane mix, we can fit your needs. This 330g Screw on Cartridge Butane / Propane Mix is the perfect 330g gas canister. When it comes to propane camping gas, I Gas Direct is the place to go. Please contact us if you are searching for a screw on gas canister or a 330g gas canister, a member of our team will be in touch.