Counter, Differential Cell (GKZ) contract manufacturers

8 US facilities list FDA product code GKZ as a contract manufacturer (7) or contract sterilizer (1).

FDA-registered (openFDA, export of Oct 21, 2026)

FDA device name

Counter, Differential Cell

Product code

GKZ (FDA product classification database)

Device class

Class II

Regulation

21 CFR 864.5220

Classification panel

Hematology