Made of high-quality iron material, strong and durable, long service life. The hot air near the graphics card can accelerate the diffusion of the opening holes of the PCI block slice and improve the heat dissipation efficiency. PCI slot cover with screws, these standard chassis ventilation slot covers can be used to cover open PCI slots. Mounting screws are included for easy installation. Suitable for household computer chassis fan dust to keep computer hardware in good working condition. Length: 12cm.Width: 2 cm.Height: 1.2 cm.Package includes: 6PCS PCI slot cover, 6PCS screws.