M-D 43816 Door Bottom with Vinyl Fins, 36 in L, 2-1/2 in W, PVC | 36 in L-shaped rigid vinyl door bottom with flexible vinyl fins. Screws included. For use with saddle threshold. Fits 1-3/4 in doors. Designed to be used with smooth top thresholds to seal out drafts from the bottom of your door. Helps make your home more comfortable.