Borosilicate 3.3 glass.

• Precisely ground flat flanges and interchangeable tubulated lids
• Standard ground joint NS 24/29 junction tube in the lid, complete with stopcock plus PTFE spindle
• Base and lid with flat flange ground to fit
• High mechanical, thermal and chemical resistance

Due to the increased wall thickness, these desiccators can be used up to the maximum vacuum that is technically possible.