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 for your family or friends, just use your imagination The sublimation blanks are made of MDF material, which is smooth 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 fer blanks are double sided printed, you can create various images or patterns on both sides, smooth 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 smooth edges Easy to use: If you want to fer images or patterns on the sublimation keychain blanks, please set the temperature of the fer machine to 180 degrees Celsius (356 degrees Fahrenheit) for 35 seconds, the heat fer temperature and time are subject to your local temperature and Humidity, and keep the sublimation blanks cool before removing the sublimation tape or ferring the image to the second side size: about 6 x 4cm Material: MDF colour: white Package Contents: 50 x rectangle sublimation keychain blanks 50 x key rings 50 x plastic retaining clips 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.