TRENDnet LC Duplex Fiber Optic Keystone Coupler Jacks– 5-Pack, TC-K05LC, Single-Mode & Multi-Mode Fiber Compatible, Use TC-KP24SA Shielded Blank Keystone Patch Panel (Sold Separately) LC Duplex 5 PackTRENDnets LC Duplex Fiber Optic Keystone Coupler Jacks 5 Pack, model TC K05LC, includes five LC duplex fiber keystone jacks for use with TRENDnets TC KP24SA blank shielded keystone patch panel. These fiber keystone jacks are designed for gigabit and 10G fiber optic network applications. Each fiber keystone jack is designed for use with single mode or multi mode fiber cabling. The LC fiber female to female coupler design makes it easy and simple to