GE-450 to GE-455 Dessicator.

GE-452

Dessicator
.
Non vacuum type, supplied without silica gel  
GE-450 Dessicator 21 cm diameter  
GE-451 Dessicator 24 cm diameter  
GE-452 Dessicator 30 cm diameter  
 
Dessicator Vacuum type, supplied without silica gel.
GE-450A Dessicator 21 cm diameter  
GE-451A Dessicator 24 cm diameter  
GE-452A Dessicator 30 cm diameter  
 
GE-455 Silica Gel Water vapour absorbent.