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, 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
PVC jacket material meets CSA/CE/UL specifications
The shielded cable option has 4 conductors and is color coded rather than numbered.