1. Easy & simple to clean & change.
2. Easy to install, no need to remove fan or guard.
3. Decreasing noise level while creating low air restriction.
1. Material guard: palastic UL 94V-0/media: PU foam 30 PPI. 2. Size 40 mm x 40mm +/- 0.5mm. 3. Height 6.3mm+/-0.2mm. 4. Hole diameter 3.6mm.