OS1 OS2 LC to LC(Female to Female) Duplex Fiber Optic Adapter/Coupler with M2*6MM Screw. LC adapters uses ceramic sleeve to connect between two LC fiber Optic cables. Adapters can lock the connectors and get low insertion loss to transmission optical signal. Our LC fiber optic adapter are suitable for fiber patch panel, which means you can use them in any type of enclosure with rectangular cutouts. Material:plastic colour:blue Package Contents: 5 x LC Fiber Optic Adapter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.