Unopened and in original box.
Ballistix 8GB KIT 2 -4GB DDR4 2666 UDIMM 1.2V (BLS2C4G4D26BFSB) is a memory kit consisting of two 4GB DDR4 SDRAM modules.
The memory modules have a bus speed of PC4-21300 (DDR4-2666) and a form factor of UDIMM.
The brand of the memory kit is Ballistix by Crucial.