And there are OM1 Simplex Patch Cord that is used in pairs

For many years OM1 Simplex Patch Cord and conventional 50/125 um multi-mode fiber (OM2) were widely deployed in premises applications. These fibers easily support applications ranging from Ethernet (10 Mbit/s) to Gigabit Ethernet (1 Gbit/s) and, because of their relatively large core size, were ideal for use with LED transmitters. Newer deployments often use laser-optimized 50/125 um multi-mode fiber (OM3). Fibers that meet this designation provide sufficient bandwidth to support 10 Gigabit Ethernet up to 300 meters. Optical fiber manufacturers have greatly refined their manufacturing process since that standard was issued and cables can be created that support 10 GbE up to 550 meters.http://www.fiberyes.com/om1-simplex Cables can sometimes be distinguished by jacket color: for OM1 Simplex Patch Cord and 50/125 um (OM2), orange jackets are recommended, while Aqua is usually recommended for 50/125 um laser optimized OM3 and OM4 fiber.

Here I will mainly introduce the products of OM1 to you. OM1 62.5/125 fiber patch cord is a type of OM1 Simplex Patch Cord, with high return loss and low insertion loss, OM1 62.5/125 patch cable always apply in Fiber Optic Telecommunications and speed transmission systems. OM1 62.5/125um Multimode Patch Cables with FC, SC, LC, ST, MTRJ or MU connectors have been in huge stock and ready to ship. For example, FC to FC 62.5/125 Simplex Patch Cable is one. Those OM1 Simplex Patch Cord jumpers features good quality and therefore are perfect optically tested to make sure high end. FiberStore can customize fiber cords about length or connectors to satisfy your different requirements