Proper Size: these sublimation silicone sheets can combine to seven thicknesses, 0.15 cm/ 0.06 inch, 0.3 cm/ 0.12 inch, 0.4 cm/ 0.16 inch, 0.45 cm/ 0.18 inch, 0.55 cm/ 0.22 inch, 0.7 cm/ 0.28 inch, 0.85 cm/ 0.33 inch, for sublimation different sized tumblers, cups, water bottle, can coolers and more Quality Material: our sublimation silicone wraps are made of quality silicone, they are wear resistance, safe and heat resistant up to 390 degrees Fahrenheit (200 degrees Celsius); Provides proper temperature condition to quality prints in every mug sublimation application Easy to Use: you can use these silicone sheets to wrap a skinnier tumbler or mug to add on more thickness, and transfer heat evenly to bring vivid colorful prints Functional Design: most mug sublimation machine features a non adjustable heater, but you can use the proper thickness one or 2 pieces silicone wrap to wrap around the blank tumblers or mugs, then insert it into the mug heat plate and tight