This is a female to female BNC coupler for connecting together to male twist lock BNC ends.
HDTV Supply offers precision crafted, premium quality, gold plated coaxial connector adapters and couplers for every situation. All of our adapters feature high grade materials and quality connectors that provide secure connections. Each of these are rated to smoothly transfer 75ohm signals. This is a female to female BNC coupler for connecting together to male twist lock BNC ends.