NC4FX-B - 

Shells: Die-cast zinc. Insets: Fiberglass reinforced hard polyester. Satin nickel housing and silver contacts standard "-B" suffix on the type number designates black chrome housing and gold contacts. Females have self retentive, release latch lock. Wire Diameter Range: X Series Straight XLR Cable Connectors — 0.11" to 0.315"; RC Series Right Angle XLR Cable Connectors — 0.16" to 0.275" and have seven indexing positions for high-density applications. Also available in 6- and 7-pin and Switchcraft® 6-pin equivalent.