The Neutrik NF2C-B/2 is a 2 Pair of professional `Phono Plug` (`RCA`- or `CINCH`- type) - marked red and black. Including 2 x 2 strain reliefs for cable O.D. 3.0 mm to 7.3 mm. Additional strain relief for cable O.D. up to 8.0 mm available as accessory.