Upgrade the performance and prolong the lifespan of your 120mm fan with the SANYO DENKI AMERICA 109-1000F40 Fan Filter Kit. This kit includes everything you need to keep your fan running smoothly - 1 guard, 1 filter, and 1 cover. The 40PPI resin filter effectively blocks dust and debris, while the guard and cover provide added protection. Keep your system cool and clean with this essential fan accessory kit.