OM3 cables have a 1500 MHz-km bandwidth and a 2.3dB/km maximum attenuation at 850 nm light sources. They also have a 500 MHz-km bandwidth and a 0.6dB/km maximum attenuation at a 1300 nm wavelength. HIGH MANUFACTURE STANDARD--Using corners pressurized grinder and lapping process of SEIKO JAPAN, the core and mortise is no offset and the end face with no gap, no spots, no scratches and no depression.