Features: Made of high-quality nylon material, it can protect the gas for tank well and prevent collisions. Double zipper, smooth to use, durable and firm. Two sizes, 3 colors to choose from, can hold 230g or 450g fuel tanks. Equipped with straps, it can be carried by hand or on the shoulder, and you can freely choose the way of the backpack. It can store not only steam tanks, but also camping supplies such as steam lamps, camping lights, kettles, and water cups. Specifications: Material: Nylon Color: Black/Mud/Green Large size: Approx. 12x29cm/4.72x11.4inch Small size: Approx. 12x20cm/4.72x7.87inch Package Includes: 1x Pouch note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.