ACCURATELY READ HOW MUCH YOU HAVE LEFT WITH THE JETBOIL JETGAUGE CANISTER WEIGHT SCALE.For a more accurate reading of how much gas you have left in your Jetboil gas canister (besides shaking it around), choose the Jetboil JetGauge Canister Weight Scale. This gauge has four different settings: three for differently sized canisters, and an extra for weighing smaller gear, because every ounce counts. FEATURESGauge finds out how much gas your Jetboil Jetpower canistersThree settings for 100g, 230g, 450g canistersTECH SPECSWeight: 3oz