Replacement audio upgrade cable for sennheiser hd598 hd558 hd518 headphone color : The same as the picture show length:1.5m cable diameter : 4mm cable material: The inside cable is ofc wire jack : 6.35 / 3.5mm male to 2.5mm male(comes with the lock the same as the original cable) package include: 1 replacement cable ( there is no headphone include ) this accessory is compatible with the following: Sennheiser hd598 hd558 hd518 headphones.