Automatic Lifting Door Bottom Seal: Automatically lowers when the door closes and retracts when opened, reducing floor friction. The hidden design blocks drafts, dust, noise, and light gaps for a comfortable space Draft & Noise Blocking: Elastic silicone strip seals door gaps to block cold air, dust, insects, wind, and noise. Works as a door draft stopper, soundproof door seal, and weather stripping for homes, offices, and hotels Heavy-Duty Aluminum Alloy: Built with durable aluminum alloy housing and solid brass adjustment button for strength, rust resistance, and long-lasting use. More reliable than plastic door sweeps Hidden Easy Installation: Fits wooden doors, aluminum doors, and grooved panels. Measure the door, insert the seal strip, fix end caps, and adjust height for a neat concealed installation Adjustable & Cuttable Size: Available in multiple lengths and can be trimmed for different door widths. Adjustable sealing height fits gaps up to 14mm. Ideal for bedrooms, offices, hotels, and interior doors