Features: brand new and high quality Made of high-quality sponge material, dustproof, dust-removing. Keep your PC clean and dust free, extend the life span of your fan Large air volume, Low resistance, great for use in PC for case, and has a long service life. It can be cleaned and used repeatedly. Application Areas: Various standard sheet metal cabinets, network cabinets, server cabinets, industrial control cabinets, electric control boxes, electric control cabinets, distribution boxes etc Specifications: Item Type: Dustproof Sponge Size: approx 33x33cm/19.68x15.75in Thickness: 0.5cm/ 0.2in Quantity:1 PC Material: Sponge Density: 40PPI Color: Black Package Includes: 1 x Dustproof Sponge note: Dustproof Sponge only, other accessories demo in the picture is not included!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. No retail package. 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!