This is a NEW version of the GTX DR receptacle. The basic body style and features are retained, and the conducting parts are made of pure copper. The difference for the NCF version is that it makes use of Furutech’s Nano-technology to obtain better performance. NCF stands for Nano Conductor Formula. This is a NEW from Furutech pure copper AC receptacle like the original GTX, but here the part is manufactured with Furutech’s NCF technology, which translates into even higher performance that is obvious to the listener at even the first blush of music. SPECIFICATIONS Rhodium-plated (Alpha) Pure Copper Conductor (0.8mm) Nonmagnetic stainless conductor spring system Body material: Nylon/fiberglass with piezo ceramic and carbon damping material Cover material: Polycarbonate Parts set with nonmagnetic 2.0mm-thick stainless brace plate Specified for wire diameters of 4mm (set screw) Dimensions: 104.0 mm (L) x 47.2 mm (W) x 28.0 mm (H) Total attention to detail and build quality extends right down to a specially designed patent-pending conductor pressure plate.