Borosil® Vacuum Desiccators are rated to hold a 9.6 PSI vacuum when properly cleaned and greased. Available in inner diameters from 100mm (XS) to 300mm (XL). Borosil® Vacuum Desiccators are also available in Light-Blocking Amber. Borosil Desiccator Vacuum, Stopcock with PTFE spindle and Porcelain plate, 150 mm, Borosilicate 3.3 glass, CS/1