Package: 10pcs Ventilation Deflectors, Perfect replacement PCI Slot Cover Dust Filter Ventilation for PC Computer Case. Made of high quality metal material, high precision mold stamping, high strength, non-deformation, black surface, rust and corrosion resistance, durable to use. Vented hollow out design, fast heat dissipation, provides efficient dust reduction properties and protects your computer from overheating. Cover up open PCI slots with these standard case vented slot covers, special DIY products for computer case. Full profile, standard height design, can fit in most full profile computer cases. Come with mounting screws, easy to install.