To make skinny tumblers in the Mug Press,Grab these inserts for the Mug Press to open up the range of sublimation blanks that you can do in this machine. You can now do skinny tumblers, camping mugs, and more. The inserts have three sizes and allow you to make mugs and tumblers in smaller sizes right in your mug press with sublimation.In the use of a mug heat sublimation machine with limited adjustability, Due to the different sizes of the cup, Between the cup and the machine will produce a space that can not be evenly heated, Resulting in the production of the pattern effect is not good, The three different thickness of the silicone mat perfect solution to this problem. 1 or more high heat-conducting silicone sleeves of the right thickness to wrap evenly around your mug, Then put on the heat sublimation machine, Perfectly filling the space and transferring heat evenly to bring colorful prints.color:BlueMaterial:Silica gelsize: 25 x 12cm Thickness: 0.15cm/0.34cm/0.43cmPackage Contents:3 x Silicone WrapOnly 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.