60 Sheets Ceramic Fiber Insulation Papers - Essential Glass Fusing DIY Tool --- Creates less binder burnout odor. --- Prevents glass from sticking to the base of the microwave kiln. --- Produces a glossier finish on the shelf side of your project. Specification: Material: ceramic fiber Size: 4.7 inch/ 12 cm in diameter Package Content: 60 x round kiln paper Tips of Using: 1.can be cut, but can only be used once. 2.First put the kiln paper in the kiln, then put the hot-melt glass on the kiln paper, and finally cover the kiln cover to start meltin.