... 4H; 5, texture is soft high elastic, ultrathin (about 0.35 mm), high transparency, tactility is admirable. 6, installation is simple, direct ... coated on clavier surface, do not affect any keyboard, 8, waterproof, dustproof, never worry for water, coke, coffee, dust and ash ... clavier operations.If you are interesting , pls attached me. dustproof waterproof silicone keyboard cover for HP series