Features: Practical and reusable to refill your gas tanks. Gas saver pus with pressure release button and adjustable control valve. Lightweight and small size for convenient storage. Come with different adapters for different demands. Suitable for camping,hiking,picnic etc. Specification: Model: Set 1 / Set 2 / Set 3 / Set 4 / Set 5 (optional) Package size: 220 * 160 * 80 mm / 8.7 * 6.3 * 3.1 in Package weight: Approx. 194 g / 6.8 o z Z15 Gas Saver Plus: Material: Aluminum alloy Size: 94 * 16 * 35 mm / 3.7 * 0.6 * 1.4 in Weight: 36 g / 1.3 o z Z10 Gas Adapter: Material: Aluminum alloy + Nylon Size: 55 * 55 * 30 mm / 2.2 * 2.2 * 1.2 in Weight: Approx. 42 g / 1.5 o z Z22 Gas Adapter: Material: Alumina Size: 30 * 30 * 35 mm / 1.2 * 1.2 * 1.4 in Weight: Approx. 30 g / 1.1 o z Z20 Gas Adapter: Material: Aluminum alloy + Copper Size: 30 * 30 * 32 mm/ 1.2 * 1.2 * 1.3 in Weight: Approx. 36 g / 1.3 o z Z13M Magnetic Gas Adapter: Material: Alumina Size: 44 * 44 * 30 mm/ 1.7 * 1.7 * 1.2 in Weight: Approx. 40 g / 1.4 o z Package List: 1* Z15 Gas Saver Plus 1* Z10 Gas Adapter 1* Z22 Gas Adapter 1* Z20 Gas Adapter 1* Z13M Magnetic Gas Adapter