Rittal Replacement Compact Axial Fan Filter Media, For Fan Size 12-51/64", Chopped Polyester, PK 5

Axial fan filters are sheets of filtering media that remove debris and contaminants from the air as it's pulled into a fan. They help prevent overheating and damage to equipment by preventing dust and debris from building up on the fan blades and entering the enclosure. Also called a muffin fan filter, these thin, flat sheets fit behind a compatible axial fan guard and are used to replace clogged or damaged filters. They're commonly installed on fans operating in dusty areas.

Compact axial fan guards and filters are fan attachments that block out debris to reduce the risk of damage to fans and enclosure components. They are sized to fit compact axial fans. Fan guards enclose the blades of a compact axial fan to help shield them from airborne debris or accidental contact. Fan filters fit behind a guard to help prevent dust and debris from building up on the fan blades and entering the enclosure, where it could damage components.