Fiber Optic Couplers and Adapters - ST SC/APC SC LC FC - Industry Proven - Singlemode. (ST to ST)

PacSatSales ST Coupler - 10 Pack - ST Fiber Optic Coupler for Extending Fiber Cables - Fiber Optic Cable Connectors with Twist and Turn Barrel Lock Mechanism

YIENFBEV LC Fiber Optic Adapter - LC to LC Duplex Singlemode Coupler - 5 Pack - Blue

FLYPROFiber- 2M/7ft OS2 LC to LC Fiber Patch Cable, Length Options: 0.2m-300m, 1G/10GB Single Mode Fiber Duplex, 9/125um SMF Fiber Optic Cable Cord LSZH 2Meter(7ft)