Low Loss: The Male to Female Adapter has a sleeve with Zirconia , provides high dimensional accuracy and high signal integrity, reduces insertion loss, and prevents ESD damage burning. Design: The to Fiber Connector has mini size and lightweight. It is suitable for Fiber Optics Panel Adapters, which means it can be used in any type of enclosure with rectangular cutouts. Durable Adapter: This Fiber Optic Adaptor can be reused, high precision and good compatibility. The to Fiber Coupler is specially designed to precise fiber optic cable connection or Singlemode to equipment connection. The - (Male to Female) Singlemode Fiber Adapter complies with IEC 61754-4, IEC 60784-14 and 604-3 and conform to RoHS standards. Widely Application: Apply to Local Area Networks (LANs), Storage Area Networks (), Wide Area Networks (WAN), Metropolitan Area Networks (MAN) data center, business, premises, security, FTTH, FTTP, FTTA, high EMI, and commercial applications. Colour:As shown :Metal Package Contents: 3 x communication cable connectors Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.