Please reference the manufacturers' datasheets:
https://www.supermicro.com/products/motherboard/Xeon_Phi/K1SPE.cfm
https://ark.intel.com/content/www/us/en/ark/products/94033/intel-xeon-phi-processor-7210-16gb-1-30-ghz-64-core.html
https://ark.intel.com/content/www/us/en/ark/products/94035/intel-xeon-phi-processor-7250-16gb-1-40-ghz-68-core.html
Additional motherboard details are in Chapter 5 of the manual here:
https://www.supermicro.com/manuals/superserver/mid-tower/ML-1891.pdf
In total the package will contain the following items, partially assembled and fully tested:
- 1x Supermicro K1SPE motherboard
- 1x Xeon Phi 7210 or 7250 (depending on your selection)
- 1x CoolIT EP2 / SNK-P3000A4 all-in-one liquid cooling system, with 240mm radiator
- 1x Delta Electronics DPS-650UB G power supply
Note that an I/O shield is not included, if you wish to build a system with an I/O shield you should purchase the item here:
https://store.supermicro.com/mcp-260-00042-0n.html