OWC U2 Shuttle for up to four NVMe M.2 SSDs in a 3.5-inch Drive
OWC 4.0TB U2 Shuttle 3.5-inch NVMe U.2 SSD at MacSales.com
Amazon.com: MZHOU U.2 PCI-E ExpansionCard, SFF-8639 to SSD Adapter Card, PCI-E 3.0 X4 SATA Adapter- High Power Self-Powered The NVME Standard Protocol Supports WIN7/8/10/32/MAC/Linux : Electronics
What Is U.2 SSD? How about U.2 SSD vs. M.2 SSD? An Easy Guide - MiniTool Partition Wizard
OWC 8TB U2 ShuttleOne NVMe U.2 Internal SSD OWCU2SHTL1T08 B&H