M-D 4" x 1/2" x 36" Silver Aluminum Heavy-Duty Commercial Flat-Profile Threshold is expertly designed to seal the bottom of your door, effectively blocking drafts, moisture, dust, and insects. This heavy-duty aluminum threshold is ADA , making it an excellent choice for doorways that require wheelchair accessibility. It is UL-fire rated, ensuring compatibility with fire-rated doors and helping to reduce the spread of fire and smoke between rooms. For optimal sealing, it is to use this threshold in combination with a door sweep or an under door seal. Installation is straightforward, with all necessary hardware included, and the threshold can be easily cut to the desired length using a hacksaw before installation. Model Number: 11502