EMC Series XLR Cable Connector Shells: Die cast zinc. Insets: Fiberglass reinforced hard polyester. Standard satin nickel housing and silver contacts. “B” suffix on the manufacturer's number designates black chrome housing and gold contacts. Black chrome housing and silver contacts are also available. Female connectors have self-retentive release latch lock. Configuration: All XLRs available in 3-7 pin configuration including 6-pin Switchcraft® configuration. Color rings and color boots are available in 10 different colors.