PANDUIT NK6TMBL NetKey ST Simplex Fiber Optic Adapter Modules are designed for use with multimode ST connectors and patch cords. These modules are TIA/EIA-604 FOCIS-2 compatible and exceed TIA/EIA-568-B.3 requirements. The keystone module design allows for flexibility in network installations and can be used in various PANDUIT keystone closet products and work area outlets. Color-coding options are available for network segregation. Note that these modules are not compatible with PANDUIT Mini-Com Faceplates, Surface Mount Boxes, or Modular Patch Panels.