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 , bags, phone and so on; the thickness of the transfer measures 3mm/ 0.12 inch Double-sided printed: retangle sublimation blanks are double-sided printed, you can create various or pattern on both side of it, the blanks are smooth easy to sublimate, perfect for enhance the hands-on ability and imaginations; both sides of the MDF are covered with protective layer, just tear off slowly and you will get a white rectangle heat transfer in smooth edges Easy to : if you were go to transfer or pattern on the sublimation , 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 cool before you off the heat transfer tape or transfer the on the second side Colour:White Material:MDF Package Contents: 50 * rectangular sublimation 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 the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.