Quality material: the rectangle key rings blanks are made of MDF material, which with smooth and comfortable handfeel, lightweight and high hardness, perfect supplies to decorate keys, bags, phone and so on; the thickness of the transfer keychain measures 3mm/ 0.12 inch Double-sided printed: retangle sublimation keychain blanks are double-sided printed, you can create various image or pattern on both side of it, the blanks are smooth easy to sublimate, perfect for enhance the hands-on ability and inspire imaginations; both sides of the MDF blank are covered with protective layer, just tear them off slowly and you will get a white rectangle heat transfer blank in smooth edges 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: 50 * rectangular sublimation keychain blanks 50 * key rings 50 * plastic retaining clips 50 * key chain tassels(Random colors, specified colors are not accepted) Only the above package content, other products are not included. Note: Light 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.