[3]Safe & Accurate & Reusable [2]Save money by using more gas from each cylinder [4]Works on LPG (propane) & butane cylinders [1]This product can safely and accurately measure the gas capacity, according to the gas temperature test, measuring the temperature range of -10 ℃~ 120 ℃. actually show you when you are low on gas, before you run out! [5]Magnetic backing allows for easy reuse on exchange bottles, Weight: 0.32628414776 pounds, Manufacturer: Tuidzljd