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, sisters and more; What's more, you can give them as a gift and let receiver to DIY the patterns they want Printing method: the suitable sublimation temperature is 356 - 374℉/ 180 - 190℃ 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; Quality material: metal frame of this thermal transfer keychain is made of zinc alloy, and the internal thermal transfer part is metal aluminum plate, lightweight and hardness, smooth and comfortable, non-toxic and no easy to fade, suitable for a wide range of people Material: zinc alloy colour: silver Package Contents: 10 x sublimation keychains(5 pcs each of 2 types)