Product description: Good warmth resistance, ideally suited insulating propertiesMake of Mica matereial,Environmental protection, insulation, electric resistance, etc. Wide fluctuate of applications Use of long-life Material: Mica, Paper, Silicone Resin Size: 99x108mm Manual measurement, size could have slight error Packing Includes: 7Pcs Microwave Oven Mica Plates