Product Description M-D drip cap, 9/16 in width, 36 in length, aluminum, with vinyl seal. Use this quality aluminum and fin vinyl door bottom to seal out drafts from the bottom of your door. Helps make your home more comfortable and saves energy. Door bottom installs on the inside bottom of your door. Recommended for use with smooth top thresholds or thresholds with vinyl inserts. Fasteners are included. From the Manufacturer Use this quality aluminum and fin vinyl door bottom to seal out drafts from the bottom of your door. Helps make your home more comfortable and saves energy. Door bottom installs on the inside bottom of your door. Recommended for use with smooth top thresholds or thresholds with vinyl inserts. Fasteners are included.