Description: Large kiln set , professional simple making glass fusing tools The microwave kiln is a container kiln consisting of a base and for use in a household microwaveoven. The kiln is made of a white insulating fiber and lined of the chamber with a black compound that absorbs the microwave and heats up to 1650. The heat from this compound is then transferred to the chamber and to the piece being fired. It takes between 5 to to reach peak temperature ranges depending on the size of the microwave kiln, the work being fired, and the microwave's wattage. After the firing, the kiln needs least 20 minutes before being opened. Designed for working primarily with small glass objects or precious metal clay, the microwave kiln is also suitable for firing small clay pieces, from beads and pendants to test tiles or small sculptural objects. The firing various materials and sizes needs to be determined through test firings. Microwave kiln is melting glass tool for making DIY glass jewelry DIY kiln advantages: compact, , environmentally friendly, energy saving and convenient Specification: Material: Assorted Diameter: Approx. 19.5cm / 7.68inch Inside Diameter: Approx. 12.5cm / 4.95inch Small Hole: Approx. 1.2cm / 0.47inch Package Includes: 1x DIY Large Kiln Set