What is this?Designed to fit standard LC ports on a variety of network devices, such as Ethernet switches, routers, network cards, media converters, and other digital products, this LC port dust cover provides durable protection for your LC port, extending its lifespan.What will I get?LC Dust Covers CapsMaterial: SiliconeColor: BlackPlug Size: 4.40x10.60x11.80mm/0.17x0.42x0.46(W*L*H)Total Size: 6.00x12.00x15.50mm/0.24x0.47x0.61inch(W*L*H)Packing List: 50 x Black LC Dust PlugsAre there any advantages?Made of soft, heat-resistant silicone, this durable LC port dust cover prevents lint and dust from entering devices, and protects the port from liquid dirt, oxidation, and rust.
eBay