RURIHAI For vivo Y28 5G High Aluminum-Silicon Glass Screen Protector Secondary Hardening This high aluminum-silicon glass screen protector has undergone secondary hardening, strengthening treatment after tempering, so its density increases and protection effect upgrades. The hardness is up to 9H, super anti-scratch and highly wear-resistant. Self-adhering makes it easy to apply, with no residue left. Secondary hardening treatment provides a solid defense against damages High light transmittance, clear display The black edge makes the screen film more beautiful These layers are applied by plasma spraying 0.26mm thickness but 9H hardness with secure explosion-proof function 2.5D arc edges, safe and smooth to use Using AB glue to absorb mobile screen automatically, simple installation Package included: 1 x High Aluminum-silicon Glass Screen Protector 1 x Wipes Set 1 x Dust-absorber 2 x Guide Stickers Other items not included