performance: The coupler has the advantages of high precision, good consistency, high reliability and good stability.Long service life: The adapter can be reused up to 1000 , which is more durable than similar .Uses: The connector can be used for optical fiber splicing and connector coupling with low insertion loss and high return loss characteristics.High-quality materials: The connectors are made of high-quality metals and plastics, which are durable and have a long service life.Specification:Item Type: Male to Female Fiber Optic AdapterInsertion Loss (dB): 1310nm ( less than or to 0.3), 1550nm ( less than or to 0.3)Return Loss (dB): 1310nm ( greater or to 60), 1550nm ( greater or to 60)Interchangeability (dB): less than or to 0.20Operating Temperature: -25 Celsius ~ +75 CelsiusStorage Temperature: 25 Celsius ~ +75 Celsiuscolour: blue + silverMaterial: metalsize: length about 46mmPackage Contents: 1 x Male to Female Fiber Optic AdapterOnly the above package content, other are not included.Note: Light 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.