Industrial & Scientific" /> Wrap-around door shoe attaches to a 1-3/4" thick door bottom to protect from damage and to close the gap between the door and the threshold The aluminum door shoe channel is lightweight yet strong and has an unpolished mill finish to match existing hardware Black vinyl insert flexes to create a light seal against the threshold without inhibiting door movement Insert has three parallel fins that are alternately notched to allow air flow under the door while still blocking light and sound Tested and approved under UL10C for fire