The M-D Vinyl U-Shape Deny Slide-On Under Door Seal features vinyl fins for protection from drafts, moisture, dust, and insects. The vinyl fins provide a physical barrier to stop bugs and are embedded with a natural abrasive. Deny is easy to install since it does not require hardware. A compression fit secures the Under Door Seal to the bottom of the door. Save on energy by sealing the bottom of the door and keeping the heat or air conditioning from escaping. Before installation, cut to the desired length using a hacksaw.