Microsoft Lumia 640 GLASS Screen Protector Covers (3 Pack), Bubble Free Oleophoic Coated Tempered GLASS - MPERO Oleophobic coating that offers reduced smudges and fingerprints. Ultra-slim 0.33mm tempered glass precisely designed for your device's screen. Easy to install, just clean and apply with the non-residue based adhesive. True screen crystal clarity and smooth realistic touch screen sensitivity. Compatible with Microsoft Lumia 640.