Use this rainbow marble hydro sublimation transfer sheet to add a dynamic and personalized look to 3D surfaces like tumblers, flasks, thermoses and more! Cut to size and activate the sheet by applying water, securing the sheet to your desired surface and using a heat gun. Details: Multicolor 12" x 20ft. (30.4cm x 6.1m) 30 gsm Heat activated and works on 3D surfaces Permanent and acid free Instructions included on packaging Wood paper fiber, polyester coating and water-based sublimation ink No printer required Compatible with most sublimation ready surfaces, sublimation ovens, heat presses and cutting machines Store in a dry place, moisture will damage hydro sublimation sheets Note: Transferred colors will be more vibrant and intense.