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 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, and hardness, smooth and comfortable, non- and no easy to fade, suitable for a wide range of people Material: zinc alloy colour: silver Package Contents: 20 x sublimation keychains(10 pcs each of 2 types) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.