If you need to link several STP networking cables together, or extending existing STP cable runs, In-line Cat.5E shielded coupler can help you make the right connection. The in-line coupler provides a female-to-female feed-through connection for easy cable hook-up. The coupler is fully covered in metal case to protect sigal against electro-magnetic noises. Foe use with Cat.5E STP Ethernet cables STP = Shielded Twisted Pair Connectors: One RJ-45 Female to One RJ-45 Female Type: 8 conductor straight-thru RJ-45 Cat.5E Designed for computer networking applications Works with all BestLink Netware Cat.5E patch cables