Frost King B79/36H U-Shaped Door Bottom with Vinyl Fins CDB 134, 36", Brown Seal out drafts, dust, bugs, and outdoor air with the Frost King B79/36H 36-inch U-Shaped Door Bottom, a durable, adjustable vinyl door sweep designed for a tight, energy-efficient fit on both wood and steel doors. Engineered to slide over the bottom edge of 1-3/4-inch thick doors, this brown door bottom provides a simple yet effective solution for improving indoor comfort and reducing heating and cooling costs. Its U-channel design allows for quick, tool-assisted installation without the need for adhesives or permanent modifications. Constructed from rugged PVC (vinyl), this door bottom resists cracking, warping, and moisture damage, making it ideal for use in entryways, basements, garages, and other high-traffic areas. The interior features flexible vinyl fins that compress when the door closes, creating a dynamic seal that blocks cold air in winter, keeps cool air inside during summer, and prevents the entry of dirt, dust, insects, and light. The fins are designed to accommodate floor irregularities and carpeted surfaces, maintaining consistent contact for reliable performance. The door bottom is adjustable?simply trim to fit narrower doors or shorter sections for custom installations. It includes all necessary screws for secure screw-on mounting, ensuring a long-lasting hold that won?t peel or loosen over time. With a total height of 4.25 inches and a width of 1-3/4 inches, it fits most standard exterior and interior doors while maintaining a low-profile appearance. Ideal for residential applications, the B79/36H enhances weatherstripping performance and helps maintain consistent indoor temperatures. Its brown finish blends well with common door frames and trim, offering a clean, finished look. Whether you're upgrading an older door or improving energy efficiency in your home, this door sweep delivers practical protection and easy installation. Features - 36-inch U-shaped vinyl door bottom for 1-3/4-inch thick doors - Fits both wood and steel doors?ideal for residential entry and exterior doors - Adjustable design can be trimmed for custom fit - Slides over door edge for quick, no-adhesive installation - Screw-on mounting with included hardware for secure, durable attachment - Flexible vinyl fins create a tight seal against drafts, dust, dirt, and pests - Helps improve energy efficiency by reducing air leakage - Keeps cold air out in winter and conditioned air in during summer - Durable PVC construction resists moisture, cracking, and UV degradation - Works on carpet, hardwood, tile, and concrete floors - Effective gap filler for spaces up to 7/8 inch under the door - Brown color blends with most door finishes and trim - Low-profile design allows smooth door operation - Easy to install with basic tools - One-year warranty for added peace of mind Specifications - Brand Name: Frost King - Model Name: B79/36H - Part Number: B79/36H - UPC: 077578020617 - Global Trade Identification Number: 10077578020614 - Product Type: Door Sweep - Application: Doors (Exterior and Interior) - Length: 36 in (3 ft) - Width: 1-3/4 in - Height: 4.25 in (packaged), 2 in sealing height - Door Thickness Compatibility: 1-3/4 in - Material: Vinyl (PVC) - Color: Brown - Finish: Steel (internal reinforcement) - Mounting Type: Screw-On (U-channel over door bottom) - Installation: Bottom-mount, screw-fastened - Hardware Included: Yes (screws) - Adjustable: Yes (can be cut to size) - Seal Type: Vinyl Fins - Indoor/Outdoor Usage: Exterior and Interior - Commercial or Residential: Residential - Packaging Type: Shrink Wrapped - Each Weight: 0.538 lb (9.4 oz) - Unit Count: 3.0 Feet - Warranty: 1 Year - Manufacturer: Frost King - Country of Origin: US - ECCN: EAR99 - UNSPSC: 30141510 Product Application The Frost King B79/36H U-Shaped Door Bottom is engineered for homeowners seeking an affordable, durable way to weatherproof their doors and improve energy efficiency. Whether sealing an old entry door, reducing noise, or keeping out pests, this vinyl door sweep delivers reliable performance in all seasons. Its rugged build and easy installation make it ideal for DIYers, property managers, and contractors alike. With its ability to conform to various floor types and resist wear, it?s a smart upgrade for any home focused on comfort, efficiency, and long-term value.