Amazon.co.jp: M.2 NVMe SSD to PCIE 3.0 X 4 Adapter M Key Interface Card Support PCIE x 4 x 8 x 16 Slots : Computers
M Key M.2 PCIe NGFF SSD to PCI-e Express 3.0 x4 Adapter Card Controller with Heatsink for 2230 2242 2260 2280 mm M Key M.2 PCIe Based AHCI NVMe SSD - Newegg.ca
M2P4B (PCIe 3.0 X4 - M.2 PCIe Gen3 SSD アダプタ)
x4 PCI Express to M.2 PCIe SSD Adapter - Drive Adapters and Drive Converters | Hard Drive Accessories | StarTech.com
M2-PCIE4XCA01 | PCIe M.2 (NGFF) to PCI Express x4 Adapter | M.2 to PCIe adapter | M.2 Expansion | M2-PCIE4XCA01
ASRock Z97 Extreme6 Tests Samsung XP941 M.2 x4, Plextor M6e M.2 x2 and Samsung 840 Pro SATA 3 SSDs | The SSD Review
Amazon.com: M.2 NVMe PCIe Adapter,Dual M2 SATA B Key and NVMe M Key SSD to PCI-e x4 Adapter Card for 2280 2260 2242 2230 SSD, with M.2 Heatsink (M.2 NVME Mkey Card) :