Rubber Stopper for Erlenmeyer Flask 2 Holes

This is used to seal the openings of narrow mouth 250 mL Erlenmeyer flasks and other laboratory glassware that require a tighter seal or a greater degree of chemical resistance with two holes opening for insertion of a thermometer, glass tubing or stirrer for use during chemical reaction to prevent leaks, hazards and contamination.

Shape: Cylindrical with a tapered bottom end

Material : Premium grade SBR black rubber compound with the following dimensions:

a) Height: 25 mm

b) Top Ǿ: 32 mm

c) Bottom Ǿ : 26 mm

d) Hole Ǿ: 5 mm

Number of holes : Two holes

Dimension tolerance on height, top and bottom diameter : ± 0.5 mm

Hardness : 40 ± 5 Duro. Tender product as per DEPED Guidelines.