NP2C-BAG connector. Neutrik 6.3mm metal (black) mono jack plug. 2 pole 1/4" professional phone plug, black metal housing, Nickel contacts. Professional phone plug with robust metal shell and chuck type strain relief. Features & Benefits. . Rugged diecast metal shell . Chuck type strain relief for optimum cable protection . Precision machined one-piece contacts - avoid hook up of tip contact . Meets all prevailing standards.