The N033-001-10PK Telephone Straight-Through Modular In-Line Couplers (F/F) connect two RJ45 telephone cables to create one longer cable. Not Cat5/6 rated, these couplers provide a female-to-female feed-through connection for use with telephone-type applications. Recommended for telecommunications and data networking applications in which connecting existing cables is preferable to replacing them with longer cables. Package includes 10 couplers.