This cable is typically used for motor wiring from the drivers to the stepper motors. There are multiple wires within the gray jacket (called conductors). Specs: Unshielded, stranded copper, PVC jacket material, meets CSA/CE/UL specifications, standard flex (specifically made for use in motion applications). The individual wire insulation has the conductor number labeled so color coding is not necessary. Here is a handy link to learn about wire gauges and current handling capacity
20 AWG
4 Conductors
Unshielded
Stranded copper
PVC jacket material meets CSA/CE/UL specifications
Standard Flex (specifically made for use in motion applications