Lisol Complete Air Vent Filters Kit- 98'' x 18'' Electrostatic Media With 157'' of Installation Tape 36Filters per Roll for HVAC, ACHeating Intake RegistersGrilles.

QUICK AND EASY INSTALLATION: 1. Measure vent cover. 2. Cut to fit any vent. 3. Cut and adhere installation strips to vent cover. 4. Apply filtration to register. 5. Change filtration every 1 to 2 months or as needed. This vent filtration works on all over the home including vents on the floor, wall, and ceiling.