3M Filtrete 20 In. x 25 In. x 1 In. 1500 MPR Allergen, Bacteria & Virus Smart Furnace Filter 310 It includes a lock bolt

It includes a lock bolt that is key activated from both inside and outside

Left and right-hand wire-looping holes near tip

Standard sets fit door openings from 24 In

By selecting Mode 4

3M Filtrete 20 In. x 25 In. x 1 In. 1500 MPR Allergen, Bacteria & Virus Smart Furnace Filter 310 It includes a lock boltFiltrete Smart Allergen, Bacterial & Virus filter attracts and captures microscopic particles like bacteria, particles that can carry viruses, and large particles like mold spores and pollen. Filtrete Smart Air Filters take all the guesswork out of knowing when it is the right time to make a change. Simply connect the filter to a mobile device via Bluetooth and monitor the home's air filtration system with active filter life tracking, environmental