Made of borosilicate glass 3.3. plastic coated.

• Thick-walled Erlenmeyer flask with plastic safety coating
• Vacuum gauge with two scales (1000 to 0 mbar, 760 to 0 mm Hg)
• PVC ventilation valve for vacuum regulation
• Glass port thread: GL 18 with plastic fittings for ³/₈" Int. Ø. tubing
• GL 45 threaded bottle neck

Traps vapor/liquids to prolong pump life.