Metallic braided cable is more compression resistant and tougher than plastic-coated cable. It also looks great. The cable housing has a thin clear plastic sheath to protect you bike's paint.
5mm diameter housing.

One bike's worth, includes:

1 x 1550mm length lined housing
1 x 800mm length lined housing
1 x 2000mm stainless steel slick pre-stretched cable (with one road and one MTB end; cut off the end you don't need)
1 x 1000mm stainless steel slick pre-stretched cable (with one road and one MTB end; cut off the end you don't need)
6 x ferrules
2 x tips