Feature●MERV 7, polypropylene co-pleated with wire Mesh stage 2 filter designed specifically for commercial use●Fits: drivees defend air HEPA 500 machines●Premium filter that meets or exceed OEM filter efficiency●16x 16 x 1(actual Size 15. 7x 15. 7 x 0. 8●This is a Sanitized replacement part●Part Number F271 , 13-00199●This is an aftermarket of generic partDescription Janitized jan-hvac186 premium replacement stage 2 pre-filter designed to fit dri-eaz defend air HEPA 500. Oem # F271 , 13-00199 (case of 12)