This is a plug-type male to female attenuator. It抯 available in following different connector designs. Easy installation, and ideal for sensor system, signal processing and laboratory use. Firber Type SM Silica Glass (Co-ion Doped) Wavelength 1310 ? 20nm/ 1550 ?20 nm 27-CC/SM-XX/YY FC Atteunator XX Atteunation Value 03=3db 05=5db 10=10db 15=15db 20=20db YY Return Loss S0=PC S1=SPC S2=UPC contact method MSN waiting for you!