The 1550nm PM Manual Variable Optical Attenuator from Seagnol Photonics is a Fiber Optic Attenuator with Attenuation 0.6 to 60 dB, Return Loss 50 dB, Operating Wavelength 1550 nm, Optical Input Power 500 mW. More details for 1550nm PM Manual Variable Optical Attenuator can be seen below.