Vent Stickz - Self Adhesive Peel & Stick Register Vent Covers (4" x 13") Package of (6) 4"x13" Vent Stickz. Easily trimmed to fit. Stays on, unlike magnetic vent covers! Block vents in too hot, too cold, or unused rooms. Redirect and increase airflow to other rooms. Can be used on floor vents, wall vents, and ceiling vents. Sticks to metal, plastic, and wood vents. Strong, yet removable adhesive that stays put until you are ready to remove it. Is paintable. Paint to match your wall, ceiling, or floor. Can be overlapped to fit any register.