This Loklik Tumbler Press lets you easily customise tumblers and mugs - just slot in your item, hit start. It'll heat and press evenly so your design comes out spot-on every time. It works on tumblers, mugs and glasses that are about 7.5 to 8.5 cm in diameter. And with 4 blank mugs, and sublimation paper sheets you will be able to start right away.Good to know- The LED display shows the time and temperature, so you can easily check on the printing- You can adjust the temperature to suit what you're printing on whether it's ceramic or glass- Don't worry about it being left on too long, its auto-off keeps things safe