This fully-adjustable, add-on 2nd tier is tilt, height and width adjustable and can be used on a few different stands. If used with the WS-550 stand, it will require the WS-562 accessory bar. But if you are using the Z-715 or Z-716 stands, you will need the Z-720 accessory bar. And if you opt for the Z-716L stand, the Z-720L accessory bar is the one you want. (Confused yet?).
Note - The Z-727 CANNOT be used with Z-714, Z-729 or Z-730 options at the same time on the Z-715, Z-716 or WS-550 stands. The Z-727 CAN be used with the Z-714, Z-729 or Z-730 options at the same time on the Z-716L stand.