The M-D Vinyl U-Shape CINCH? Slide-On Under Door Seal features vinyl fins for protection from drafts moisture dust and insects. Save on energy by sealing the bottom of the door and keeping the heat or air conditioning from escaping. CINCH? products are easy to install since they do not require hardware and simply slide on to the door. A compression fit secures the Under Door Seal to the bottom of the door. Before installation cut to desired length using a hacksaw.