Features: 3240 epoxy board is quality 3240 glass fiber, vacuum melting, and high strength. Lightweight, strong stability, and not easily broken after long time use. With good heat resistance and moisture resistance, and can maintain stable performances at both high and low temperatures. It can maintain excellent performances in various harsh working environment, effectively extending the life and reliability of lithium batteries. Suitable for mechanical, electrical, electronic, electrical and other fields, it is also used for the processing of insulation parts, processed into various insulation accessories and equipment insulation structural components. Specifications: Material: Epoxy resin+fiberglass Attribute: yellow, F Class(155 degrees) Size: approx. 172x203mm/6.77x7.99inch Thickness: approx. 0.5mm/0.01inch Quantity: 12Pcs Package Includes: 12Pcs Lithium Cell Insulation Epoxy Board note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.