You can DIY or print your favorite patterns on the blank surface of these sublimation keychains by dye sublimation technology, it will be a unique gift or friends, just use your imaginationThe sublimation blanks are made of MDF material, which is and comfortable to touch, light weight and high hardness, perfect decoration for keys, bags, mobile phones, etc; each sublimation keychain blank measures 6 x 4 cm (L x W)Double Sided Printing: These heat transfer blanks are double sided , you can create various images or patterns on both sides, and easy to sublime, great for experimentation and imagination; both sides of the MDF blanks are covered with protection film, just tear them off slowly, you will get a white rectangular sublimation blank with edgesEasy to use: If you want to transfer images or patterns on the sublimation keychain blanks, please set the temperature of the transfer machine to 180 degrees Celsius (356 degrees Fahrenheit) for 35 seconds, the heat transfer temperature and time are subject to your local temperature and Humidity, and keep the sublimation blanks cool before removing the sublimation tape or transferring the image to the second sidesize: about 6 x 4cmMaterial: MDFcolour: whitePackage Contents: 50 x rectangle sublimation keychain blanks50 x key rings50 x plastic retaining clipsOnly 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.