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.
