Each duplicator comes bundled with a 2.5" M2 (NGFF) flash drive kit that turns a M2 (NGFF) card into a 2.5" SATA SSD. You can mix and match the M2 (NGFF) SSD, 2.5" SSD or standard SATA hard drives ...

Anyway, it turns out that M2/NVME -> 2.5" SATA adapters are non existent; every single M2->2.5 adapter I find is either for B or B+M key M2s (NGFF) and/or the have a SAS/U2 connector which I can't ...

The Addonics Dual Hyper HDD M2 Hybrid Controller (model AD4SAHM2) is a two-port SATA III PCI-e 4-lane host controller combined with two M2 (NGFF) SSD slots.

Because the heatsink consists of a front and backplate as well, the compatibility is limited to M.2 (NGFF) connectors of 4.2mm height.

CES 2013 - ADATA had one of the only working NGFF products on display at CES that we saw. NGFF stands for Next Generation Form Factor and it's the next evolution for SSDs.