Printing method: the suitable sublimation temperature is 356 - 374Fahrenheit/ 180 - 190Celsius for 60 - 70 seconds, but the above information is for reference only, adjust your time/ temperature settings based on the ink, paper and product provided. Portable size: this sublimation keychain is convenient to carry, rectangle blank keychain is width 27mm, You can use them to decorate keys, bags, handmade presents. Quality material: metal frame of this thermal transfer keychain is made of zinc alloy, and the internal thermal transfer part is metal aluminum plate, and hardness, smooth and comfortable, non- and no easy to fade, suitable for a wide range of people. DIY gift choice: you can DIY or print the patterns on the surfaces of these blank keychains by the sublimation technology, which would be a lovely gift for your friends, girlfriends, mother, and more; What's more, you can give them as a gift and let receiver to DIY the patterns they want. Easy to DIY: Cut your favorite pattern into the size of a sublimation blank board, If there is a protective film, tear off the protective film on the pendant, paste the sublimation bottle opener and heat it to 356 degrees Fahrenheit/180 degrees, wait for about 60 seconds, and the exquisite and handicraft is complete.