About this item Replacement audio upgrade HIFI cable compatible with various noise-cancelling headphones. Length: 3.94 x 1.57 x 0.39 inches, package includes: 1 replacement cable + 6.35mm adapter (headphones not included). Cable diameter: 4mm, cable material: the inside cable is OFC wire, the outside cable is braided tangle-free cable. Jack: 3.5mm Male & 6.35mm adapter to 2.5mm Male. This cable is specifically designed for certain headphone models (note: it is not compatible with some other models). Size description: 3.94 x 1.57 x 0.39 inches.