M-D Building Products 6403 36-Inch Fits 1-3/4-Inch Doors U-Shaped Door Bottom with Drip Cap Fits 1-3/4-Inch thick by 36-Inch wide doors. Seals up to 7/16-Inch Gap Between Bottom of Door and Threshold. Durable powder coated white finish Vinyl seal provides all-season protection against drafts, moisture, dust and insects White finish