Nouvolo is currently selling Steck as a PC case only. Steck is compatible with numerous hardware components in the market. You can choose the hardware that best suits you needs from many merchants such as Amazon, Best Buy, etc.
Steck supports the following standards:
motherboard - mini ITX (Intel / AMD)
graphics - PCIe 3.0 x16, 300mm (L), 140mm (H)
power supply - SFX
air cooling - 70mm (H) CPU height clearance
AIO liquid cooling - 120mm / 240mm type (with stack unit)