What is this?Silicone SFP port protection cover is used for protecting SFP ports of various electronic devices, such as internet, data center, and network devices, routers. SFP dust cover can prevent dust and moisture from entering the port and protect the port from damage.What will I get?Silicone SFP port protection cover, is in size of : 17mm x 15mm x 12mm/0.67 inch x 0.59 inch x 0.