Check the listing for details. Alumina Ceramic Sheet Cooling Pad Insulating 30pcs 3.5mm Hole 25x20x2mm. Condition: New. Listed at 25.48 USD. What is this?Alumina ceramic radiator sheet is a kind of thermal conductive and insulating material, which is used for electronic equipment requiring heat conduction, heat dissipation, insulation and high temperature resistance, and is widely used in high-power equipment, Mos, communication equipment, mechanical equipment, etc.What will I get?The alumina ceramic sheet, is in size of : 25mm/1-inch length, 20mm/0.8-inch width, 2mm/0.08-inch thicknessIn the package of: 30pcs x Alumina ceramic sheetIs there any advantages of the product?Alumina ceramic sheet has high hardness and is a good heat dissipation and insulation material; Small size, light weight, uniform heating, good thermal conductivity; High temperature resistance, abrasion resistance, corrosion resistance and durabilityHow to use it?Steps of installation:1.