Quality material: Sublimation keychain blanks are made of MDF material, which with smooth and comfortable touch feel, and high hardness, perfect supplies to decorate keys, bags, phone and so on; diameter of each heat transfer blank measures 5 x 5cm/ 1.9 x 1.9 inch, thickness about 3mm/ 0.12 inch. Double-sided Printed & protective layer: these heat transfer blanks are double-sided printed, you can create image or pattern on both side, smooth and easy to sublimate, great for improving exprimental ability and inspiring imaginations; both sides of the MDF blank are covered with protective film, just tear them off slowly and you will get a white heat transfer blank in smooth edges design. Easy to Use: if you were go to transfer image or pattern on the sublimation keychain blank, please set the temperature of your transfer machine 180 degrees Celsius (356 Fahrenheit) for 35 seconds, the heat transfer temperature and time affect by your local temperature and humidity, and please keep the sublimation blank cool before you peel off the heat transfer tape or transfer the image on the second side. Colour: White Material: MDF Package Contents: 240 * Blank boards 240 * Key rings 240 * Jump rings 240 * (random color, don't accept the specified color) 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.