Synology

Synology D4EU01-4G. Internal memory: 4 GB, Memory layout (modules x size): 1 x 4 GB, Internal memory type: DDR4, ECC

Synology D4NESO-2666-4G. Internal memory: 4 GB, Memory layout (modules x size): 1 x 4 GB, Internal memory type: DDR4, Memory clock speed: 2666 MHz, Memory form factor: 260-pin SO-DIMM

Synology Rail Kit RKS-01. Type: Rack rail kit, Product color: Gray, Compatibility: FS series:FS2500. Minimum rack depth supported: 21.8" (55.3 cm), Maximum rack depth supported: 32.8" (83.4 cm)