Multimode Pigtail (OM1, OM2, OM3, OM4): Has a larger core (62. 5/125µm or 50/125µm) and is used for shorter distances within buildings or campuses. Fiber Optic Pigtail assemblies are utilised in terminating fiber optic cables via fusion splicing. Iveonet ™ offers a wide range of multimode pigtails, designed and manufactured for demanding network applications, comprising of multimode OM1, OM2, OM3 and OM4 (62. Economy pigtails offer over a. Fiber Optic products. Quality assurance by 100% end-face, IL & RL testing.