The kit comes with everything you need to replace your iMac Pro stand with a mounting bracket, which lets you attach your iMac Pro to any VESA-compatible wall mount, desk mount, or articulating arm to customize your workspace.
With the VESA Mount Adapter attached, your iMac Pro complies with the VESA FDMI (MIS-D, 100, C) version specification. This adapter supports iMac Pro and cannot be used with any other iMac or display. Use the adapter only with a VESA mount that can support the weight of your iMac Pro.The kit is priced at $79 in the United States and is currently estimated to ship in 2-3 weeks, so deliveries should begin in January.
While ordering the iMac Pro on Apple's online store, the kit can also be added for $79 as part of a custom configuration.