How to fill with butane gas? 1. Choose long mouth: install any brand of butane fuel. Pay attention to short mouth 2. Turn the lighter upside down: insert the mouth of the butane gas tank into the refueling port. 3. Add fuel: Press firmly to add fuel. Be careful and press hard. 4. Disperse the fuel (the most important step): shake the lighter up and down 4-6 times (shake once after each filling is completed) 5. After adding butane, remember to wait at least 3-5 minutes before igniting. tip Please allow slight measurement deviations due to manual measurement. Due to differences in monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture. If you have any issues with your new lighter, please let us know and we will take care of it. We will reply to you within 24 hours, your satisfaction is very important to us.