1.Low back reflection and Low 2.High precision attenuation value 3.Precision control of attenuation range 4.Wide attenuation range Usage:, Access Network Optical Fiber CATV Terminal of the Devices and Multimedia Testing and Medical Devices Optical Fiber LAN and Access Network Industry and Applications Colour:Blue Material:plastic Package Contents: 5 x 10dB Fiber Optic Adapter(Due to different product batches, the appearance , which does not affect the use) 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.