M-D Building Products 5322 36-Inch U-Shaped Door Bottom with Vinyl Seal Fits 1-3/4-Inch thick by 36-Inch wide doors. Seals up to 3/4-Inch Gap Between Bottom of Door and Threshold. Multiple vinyl fins provide a weather tight seal All Season protection against drafts, Moisture, Dust and Insects. Fasteners for wood or steel doors included