'Professional 3 Pole 1/4'' Telephone Connector, Nickel Contacts, Black Housing. The Heavy Duty Professional Telephone Connector Series improves on the existing C Series design by offering the 1/4'' gauge connector. The thinnest available on the market, with Neutrik's exclusive chuck-type strain relief. The slim housing with a width of 14.5mm meets the latest requirements for high-density patch panels (15.88mm spacing between connectors). Precision-machined, rivet-free tip contact makes it unique and prevents snagging on the jacks or tip breakage.The X series connectors suit all applications such as guitar applications, audio cables, snakes, speakers, amplifiers and mixing consoles.'