This keychain is personalized and can be printed with various advertising slogans.Aluminum sheet size: 3.5*2, weight: 21gWishing you all the best! Our company offers a variety of products that can be customized with beautiful and cute images. Our products are affordable, easy to make, and versatile. Now, I'll show you how to make them. First, peel off the plastic film from the aluminum sheet. Then, stick the printed paper onto the aluminum sheet and use high-temperature glue to secure it in place, making sure it doesn't shift. Turn on the machine and set the temperature to 180 degrees Celsius for 70 seconds or 340 degrees Fahrenheit for 70 seconds. Make sure the pressure is slightly even. When the machine's alarm sounds, turn it off. Be careful when handling the product under high temperatures, as it's hot. If you have any questions, feel free to contact our customer service at any time. Thank you for your attention and we hope our cooperation will be enjoyable!