Item Type: Hand Warmer Material: Zinc Alloy Weight: Approx. 154g / 5.4oz Product Size: Approx. 10x7x1.5cm / 3.9x2.8x0.6in Package List 1 x Hand Warmer 1 x Storage Bag 1 x Fuel Can 1. Please allow 01 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3. When you use it for the first time, you need to add more fuel, because the cotton in the first use is dry and absorbs more fuel.4. When refueling, be sure to remove the burner head and add it again, and the catalyst must not be directly exposed to the fuel.5. Please be sure to use special fuel for hand warmer, do not use gasoline, ethanol and other fuels, so as not to damage the catalyst.6. The catalyst is a consumable, it is recommended to buy a few more catalysts as a spare when buying a hand warmer.7. The product is shipped without fuel. 1[ZINC ALLOY MATERIAL] This hand warmer is made of high quality zinc alloy material, and the surface is mirror polished, smooth and textured, durable and long lasting. 2[HOLLOW DESIGN] The special heating catalyst generates heat and dissipates it from the holes to achieve a heating effect, good thermal conductivity, and continuous constant temperature. 3[FUEL CAN] The catalyst hand warmer is equipped with a leakproof fuel can. Insert the fuel can into the oil filling port. It is easy to refuel without leakage, and it is convenient and quick to use (no oil). 4[MINI SIZE] Light weight, small size, compact, light, can be put in a pocket, carry it with you, suitable for home, office, outdoor, travel, camping, picnic and other occasion. 5[NO ELECTRICITY] This hand warmer does not need electricity, no open flame, no smoke, constant temperature and warmth, safe and comfortable, suitable for winter use.