Primus liquid petroleum (LP) gas has been formulated for the greatest reliability and four season performance. Combines butane, propane and Iso-butane. All canisters are fitted with a Primus-patented self-sealing safety valve and international standard screw threads allowing easy and quick separation from the stove for easy packing and storage. Will fit most European makes of gas stove (100g canister will fit JetBoil range). Available in three sizes: 100g, 230g and 450g. The 100g cannister is ideal for overnight trips and exercises, the 225g canister contains the equivalent of approximately 0.35 litres of methylated spirits, sufficient to boil approximately 10 litres of water and is ideal for cooking for one on shorter exercises or expeditions. The 450g canister is sufficient to boil approximately 20 litres of water and is ideal for group cooking etc. Gross Weight: 100g (202g); 230g (382g) and 450g (670g). Dimensions (approx): 100g (9cm x 7cm); 230g (10.75cm x 9.5cm); 450g (10.75cm x 15cm).