M-D Building Products 78899 36-Inch DB347 Door Bottom, Brown Fits 1-3/8-Inch or 1-3/4-Inch thick by 36-Inch wide doors Seals up to 7/16-Inch gap between bottom of door and threshold Durable brown vinyl construction Vinyl seal provides All-season protection against drafts, moisture, dust and insects Slotted screw holes for easy adjustment