[Easy to install] Simply align the tip of the with the hole in the door and squeeze the in with a tool to complete the installation, easy and quick [Good use effect]Using the metal door can absorb shocks, reduce noise and loudness, and bring you a quiet environment [Dimensions]The bottom outer diameter is approximately 12mm/0.47inch, the upper cone diameter is 8mm/0.31inch and the card height is 2.5mm/0.098inch; high quality technology with a smooth, textured, burr-free [High-quality materials] The silicone rubber used for metal door Muffler is high quality, high temperature , good sealing performance, odourless, not easily deformed, safe and environmentally friendly, and can meet your long-term use needs [Adequate quantity]You receive 100 metal door silencers, sufficient quantity for your daily use and replacement needs., Manufacturer: Akfldms