Product Content: You will receive 40 pieces of hardboard cork coasters. Sufficient quantity will meet you various DIY making needs. Premium Material: These sublimation cork coasters are made of cork back and MDF material. The size of them is about 4x4in or 10.2x10.2cm, and their thickness is about 0.16in or 4mm. Practical: Blank hardboard coaster can be used for sublimation ink, sublimation paper and heat press machine. You can easily DIY sublimation coasters at 355-375 degrees Fahrenheit or 180-190 degrees Celsius for about 60-70 seconds. Tearing off the transparent protective film before using. : MDF sublimation coasters are very suitable for sublimation, which are perfect choices for making interesting gifts. You can use your imagination to print meaningful and patterns, words, family photos, pets or beautiful natural scenery on the blank sublimation coasters, and gift them to your lovers, friends, family members and yourself. Usage: These sublimation coasters blanks are not only for DIY coasters, but can be used for placing coffee mugs, tea cups, wine glasses and various glass bottles in kitchen, living room, bedroom, office, cafe, etc. Colour:White Material:mdf Size:10x10cm Package Contents: 40 x Sublimation Square Coasters 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.