Glass desiccator with knob lid and unglazed procelain plate with five 1" holes. Made from high quality, heavy duty, 3.3 borosilicate glass.

• Holds a full vacuum (740 mm Hg 20 cm) at room temperature for 24 hours - will remain airtight even if not under vacuum
• Chamber and lid are made of high quality semi-frosted borosilicate 3.3 glass
• Features a knob cover
• Unglazed, porcelain sieve plate
• Five perforation holes each measure 1" in diameter

Low temperature gradient- can withstand high temperatures and thermal shocks. Heat tolerances: Strain point 515 °C, annealing point 565 °C, softening point 820 °C.