Which stacking cables do MS switches support? Is one included in the box?

A 0.5M (50cm) 40 Gigabit stacking cable is included with MS350 series switches. Stacking cables are not included with other stackable MS series switches series, and must be purchased separately.

For full information about stacking cable compatibility, available options, and product IDs, see the Stacking Cables section of the SFP and Stacking Accessories datasheet.