... ) >55(dB)Plug number: 1000 1000 Used for optical fiber connector between the fiber optic adapter using no Angle grinding high to maintain ... the very good optical properties And high mechanical stability. Have FC/APC, FC/PC, SC/PC, SC/APC, ST, MU, MTRJ, DLFC ... /SC, ST/SC, ST/FC all sorts of model such as optional Set of drum ...