1: 5G fire protection grades: HB, V2, V1, V0, 5VA, only 3.0-V0 (burning in a dark room, extinguishing within 10S) 2: thickness: 2MM VO and VS, for example: 3MM VO, 2MM more fire protection 3: replacing the following products with white FAL8/3.0V0, a new product.