Air Box 4+ Pre-Filter Trimmers for several reasons:

for several reasons:

and maintain

- Restart delay adjustable from 0 to 20 minutes to protect lighting equipment

or ventilation controllers and monitors

Air Box 4+ Pre-Filter Trimmers for several reasons:Description Replacement Pre filter for the Airbox 4+: This item is a replacement pre filter designed specifically for use with the Airbox 4+. It's recommended to replace this pre filter every 3 months in order to ensure optimal performance and efficiency. Measurements: The dimensions of this pre filter are 19 in. x 16 in. x 1 in., making it conveniently sized for easy installation and replacement. Specifications Quantity: 1 Weight: 0. 20 lb Width: 16.