Features: Made of high-quality sponge material, dustproof, dust-removing and has a long service life. Large volume, Low resistance, High temperature resistance but not fireproof. Keep your PC clean and dust free. Great for use in PC for case. Extend the life span of your fan. It can be cleaned and used repeatedly. Application Areas: Various standard sheet metal cabinets, cabinets, server cabinets, industrial control cabinets, electric control boxes, electric control cabinets, distribution boxes, power distribution cabinets, power cabinets, integrated server cabinets, freezer cabinets, ATM cabinets, etc. Dustproof Sponge only, other accessories demo in the picture is not included! Specifications: Item Type: Dustproof Sponge Density: 60PPI Material: Sponge Size: 50x40cm/19.6x15.7in Thickness: 3mm/0.11in, 5mm/0.19in(Optional) Color:Black Quantity: 1Pc Package Includes: 1 x Dustproof Sponge note: Transition: 1cm=10mm=0.39inch Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Please note that this dustproof sponge filter is cut by the machine according to the standard size. Due to folding, shipping, etc., the size of the filter will be compressed. After receiving the goods, please put it for a while and then use it, thank you.