This professional grade aluminum and vinyl triple seal door seal – door sweep is our most popular selling door sweep for good reason. Features include three draft-stopping vinyl sealing fins for three times the sealing power. The 2-1/8″ height makes this door sweep ideal for sealing both large and small gaps on new or old, residential and commercial doors. Medium duty extruded aluminum carrier with five slotted screw holes for easy ADJUSTMENT and efficient installation. The vinyl back seal not found on all other brands means needs no caulking. The triple seal door seal – door sweep saves energy and help make your home more comfortable by preventing air loss. The triple seal door sweep has proven effective in blower door testing and is preferred by professionals and consumers alike. The triple seal door sweep may be used for interior or exterior applications. The product is easy to install, comes individually packaged with installation instructions and matching PHILLIPS head screws. Improve comfort while sealing out drafts and insects. Helps save energy and money by reducing heating and cooling costs.