FC Male-Female fiber optic attenuator fixed, SM, MM, PC, APC, 5dB, ... APC 0.9 SC/PC 2.0 SC/APC 2.0SC/PC 0.9 SC/APC 0.9 SC/PC 3. ... MM, PC, APC, 5dB, 10dB, 15dB, etc FC, SC, ST, LC type fiber optic attenuatorFemale--Female, Male--Female, fixed, variable, SM, ... MM, PC, APC, 5dB, 10dB, 15dB, etc -------all for your choice. optical fiber ...