Gear cables for bicycles are formed or two separate parts, inners and outers. The inner cable moves inside the outer initiating a gear change. We sell inners and outers separately as well as together in a pack.
Bicycle gear cables are thinner than brake cables and can be specific to individual bikes, so do check before you buy. Most are sold in a 2100mm length which can then be cut to an exact length once fitted.
We like to use products from Shimano and Clarks in our workshops.