LC to ST 50 micron fiber optic jumpers are offered here in lengths from 1 m to 50 m from our standard stock inventory. The LC connector is the newer, higher density, fiber-optic connector popular with Cisco SFP modules. The ST connector is a twist lock barrel style connector, which locks securely similar to a BNC connector and is very common in military applications. You'll find ST connectors in use around rugged environments. These cables are in use at Fortune 500 companies, the United States military, as well as government and educational facilities throughout the world. We also offer custom fiber production here in our California facility for those who require a specific length not found in our online store. Please contact us for any custom fiber requirement.