INDUSTRIAL QUALITY || Made from heavy-duty borosilicate 3.3 glass.
20CM INSIDE DIAMETER || Inner diameter of the chamber measures 20cm (5.9")
AIRTIGHT || Holds a full vacuum (740mm Hg 20cm) at room temperature for 24 hours.
INCLUDED || Includes 194mm (7.6") porcelain sieve plate that rests on the 205mm (8.1") I.D. chamber bottom, and removable glass stopcock with side arm allowing a controlled entrance of air while preventing unnecessary turbulence.
GREAT FOR PROFESSIONAL LABORATORIES, CLASSROOMS & HOUSEHOLD || Superior chemical durability and heat tolerance. Designed for use in professional laboratories, but is an ideal choice for science classrooms and household use.