OS1 OS2 LC to LC Duplex Fiber Optic Adapter/Coupler ( to ) with M2 x 6MM Screws. LC adapters use a ceramic sleeve to connect between two LC fiber optic cables. The adapters can lock the connectors and achieve low insertion loss for the transmission optical signal. Our LC fiber optic adapters are suitable for fiber patch panels, which means you can use them in any type of enclosure with rectangular cutouts. Material: Plastic Color: Blue Package Contents: 30 x LC Fiber Optic Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.