Features: brand new and high quality PCIe 3.1 x 8 to 2 m2 port SSD adapter, dual expansion card m-key to Pci-e converter for NVME 2230-22110 SSD Using Asmedia/ASM1812 chip controller,supported NVME protocol Support five SSD sizes: 2230, 2242, 2260, 2280, 22110 High-speed PCIE 3.1 transmission. Contains metal heat sink for strong heat dissipation. Specifications: Product Name: PCIE3.1 X8 to Dual Port m2. Hard Disk Expansion Card Support Interface: 2x m2 (for NVME) Interface Motherboard Interface: PCIE 3.1X4 Actual Read and Write speed: about 2GB/s Adopt : Asmedia /ASM1812 chip Size:approx 180x55mm/7.09x2.17in Supports SSD Size: 2230, 2242, 2260, 2280, 22110 Package Includes: 1 x Hard Disk Expansion Card note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.