M-D Building Products 11619 M-D Heavy Duty Fluted Saddle Threshold, 36 in L X 6 Product Description M-D saddle threshold, heavy duty, fluted, 6 in width, 36 in length, 1/2 in height, aluminum, for commercial applications. Heavy duty aluminum assures years of protection from the elements. Installing a threshold will help to seal out drafts from the bottom of your door. Helps make your home more comfortable and saves energy. From the Manufacturer Heavy duty aluminum assures years of protection from the elements. Installing a threshold will help to seal out drafts from the bottom of your door. Helps make your home more comfortable and saves energy. Features All-season protection against drafts, moisture, dust and insects Heavy duty aluminum for long lasting seal and durability Meets code for wheelchair access USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.