Features: Brand new and high quality Made of high-quality sponge material, dustproof, dust removal. Keep your PC clean and dust-free, extend fan life Large air volume, low resistance, perfect for use in PC chassis and has a long service life. It can be cleaned and used repeatedly. Applications: Various standard sheet metal cabinets, network cabinets, server cabinets, industrial control cabinets, electrical control boxes, electrical control cabinets, distribution boxes, etc. Specifications: Item Type: Dustproof Sponge Size: approx. 33x33cm Thickness: 0.5cm Quantity: 1 pc Material: Sponge Density: 40PPI Color: Black Note: Dustproof sponge only, other accessories shown in the picture are 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 place 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. Make sure you don't mind before bidding. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Dustproof Sponge