1.[ Upgrade] door weather stripping is designed with PVC flange mounting grooves, PE outer surface, and internal PU foam wool. It's more convenient to disassemble that will not adhere to your door frame. Weather proof, resistant to corrosion, flame retardant and shock-absorbing. 2.[Noise Reduction] The highly elastic 'Q' foam sponge has effectively closed that gap and sound are no longer escaping so well. The weather strip stops the heat and cold from escaping during winter and summer. Makes heating and cooling your home or office more efficient for reducing the heating & cooling bill. 3.[Size and Easy to Put up] 1 Roll 40 feet. Available for recesses from 1/4 to 9/16 inch (6.5mm to 14mm) on the top and sides of doors and windows. Cut the weather strip to the right length with scissors, and simply push the white plastic flange into the slot to complete the seal, and give your door a look! (NOTE: Please measure the width of the recess gap before purchase.) 4.[Foam Strip Application] Fit snuggly, weather stripping seal strips are widely used in all kinds of doors or windows, such as sliding doors, anti-theft doors and shower room, etc. The replacement sealing strip is designed for all-weather protection to prevent air currents and humidity. It will probably take you 15 min to seal a door.