12cm Cleanable Air Filter for Case Fans
By StarTech.com

When air is moved through your computer case, dust, grit and grime can build up and prevent your system from functioning at its optimal efficiency. Enter StarTech.com's FANFILTER12, the best way to prevent grime from building up and hindering performance. ... 

Air Filter Replacement 2-Sheets for Powerlite 740C & 745C Projector
By EPSON

Replacement Air Filter for the PowerLite 740c and 745c projector (2 sheets) ... 

NetworkAIR PA 4kVA Replacement Filter
By APC

Replacement Air Filter collects and removes condensation from the air conditioner. It removes dirt and other particulates from the intake air for cleaner supply air. Allows the user to determine when the unit operates, saving energy costs. ...