FieldCast 2Core MM Heavy Duty, 100m on drumHeavy Duty cable is a very strong and robust cable with a diameter of 6. 5 mm. Use it in the field, or wherever you need the most reliable fiber optic cable connectivity at any distance. 2Core main cable MM HD (heavy duty) 100 meters two cores of protected fiber multi mode 50 125 OM3 outer cable diameter 6. 5 mm. color coded (two blue rings for 2Core multimode) cable length 100 meters in total robust male cable connector on both sides wound on Schill