Cut-to-Fit Foam Pre-filter Air Cleaner Replacement Filter
GE Smartaire cut-to-fit foam pre-filter, fits GE Smartaire models 106633, 106643, and 106653, as well as Holmes models HAP-615 &amp; HAP615. This foam makes 2 filters and extends the life of HEPA &amp; carbon filters. The Pre-filter also removes large particulates from the air and measures approximately 15 1/2 x 20 1/2 x 1/4. For optimum performance, replace filter every 3 to 6 months.