Agilent Gas Clean moisture purifier. 

Moisture Gas Clean Filter that eliminates H2O or water from the supply and detector gases to allow for faster stabilization times for increased GC productivity, and prevents hydrolysation damage to the stationary phase, column, liner, glass wool, or septum in the GC.

Gas Filter Type: Moisture, indicating
Outlet Concentration: < 0.1 ppm
Product size: Cartridge
UNSPSC Code: 41104900

Surplus to requirements.