This looks to be the exact same SanDisk PCIe SSD as the one found in the MacBook Pro 13" Retina Display Late 2013.

Unsurprisingly, we find the exact same ICs:

SanDisk 05131 016G 16 GB NAND Flash (four on each side, total of 8 x 16 GB = 128 GB)

SK Hynix H5TQ2G63DFR 2 GB DDR3 SDRAM

Marvell 88SS91383 PCIe SSD Controller