You can extend the life of your Air Box Junior HEPA Filter with an Air Box Junior pre-filter! By catching dust and particulates before they reach the inner HEPA filter, the efficiency and effectiveness of your HEPA filter is protected. Why clog up your HEPA filter when a low-cost, easily replaceable pre-filter will do the job? Air Box Junior Pre-Filters should be replaced every 3-months.

Dimensions: 11.5" x 11.5" x 1"
Weight: 0.27 lbs