50/125 is one of the most commonly used multimode optical fiber; the other commonly used is 62.5/125 types. Here the 50 and 125 is measurement by the unit micron. One meter is equal to one million micron. Below is a picture to illustrate the basic model of 50/125 multimode fiber cables; you can identify what the 50 parts and 125 parts are.

There is a special kind 50/125 multimode fibers, which is called OM3 50/125. People usually refer 62.5/125 as the OM1 MMF, common type 50/125 MMF as OM2, OM3 is also 50/125, but it is different from OM2 because it support 10Gig data transmission. The OM3 50/125 fiber optic cable is also called laser optimized fiber cable. Both OM1 and OM2 multimode cables use the orange color jacket (standard practice for commonly used indoor multimode), OM3 use a special color, which is called Aqua.

We supply a wide range of 50/125 fiber optic cable assemblies including OM2 and OM3 cables; they feature the stable quality, good looking and very fast delivery. (Less than 10,000 pieces usually around 3 business days)