Cinch Door Jamb Seal works by creating an airtight seal around the top and sides of entry doors offering protection against air, dust, water and insects. Superior seal provides year round comfort. Installs easily into slotted door jambs. Made from aluminum with vinyl insert and is attached to door with high quality 3M adhesive technology (no screw holes). Simply measure, trim, peel and stick. Attractive flat metal surface finish. Includes (5) 42" pieces and (1) vinyl connector (enough product for 1 standard door).