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Rubber Stopper for Erlenmeyer Flask 2 Holes

Rubber Stopper for Erlenmeyer Flask 2 Holes

Product Code : JL-LEP-10275

The Rubber Stopper for Erlenmeyer Flask 2 Holes (SKU JL-LEP-10275) seals narrow-mouth 250 mL Erlenmeyer flasks while taking two tubes. This 2-hole stopper for Erlenmeyer flask set-ups is premium grade SBR black rubber, tapered, 25 mm high with a 32 mm top and 26 mm bottom diameter, bored with two 5 mm holes, so a thistle funnel and a delivery tube can pass through together. Hardness is 40 ± 5 Duro and dimensions are held to ±0.5 mm. JaincoLab supplies it as per DepEd guidelines.

Specifications

The stopper is specified by shape, material, size, holes and hardness: tapered SBR black rubber, 25 mm high, 32 mm top and 26 mm bottom diameter, two 5 mm holes, ±0.5 mm tolerance and 40 ± 5 Duro.

ProductRubber Stopper for Erlenmeyer Flask 2 Holes
SKUJL-LEP-10275
ShapeCylindrical with a tapered bottom end
MaterialPremium grade SBR black rubber compound
Height25 mm
Top diameter32 mm
Bottom diameter26 mm
Hole diameter5 mm
Number of holes2 (two)
Tolerance±0.5 mm on height, top and bottom diameter
Hardness40 ± 5 Duro
Specification referenceAs per DepEd guidelines

Applications of the 2-hole stopper for Erlenmeyer flask

The stopper is used in gas preparation and similar set-ups that need two openings. Typical uses are:

  • Fitting a thistle funnel and a delivery tube for gas preparation
  • Adding liquid to a sealed flask while gas is collected
  • Holding a thermometer and a delivery tube together
  • Building wash-bottle or trap arrangements

Scope of supply and ordering

The listing covers two-hole rubber stoppers for 250 mL Erlenmeyer flasks; quantities per pack are confirmed on the quotation. Flasks, funnels and tubing are separate items.

Minimum order quantity, packing and lead time are confirmed on the quotation for the quantity and destination. JaincoLab supplies schools, colleges and education projects, and exports to Africa, the Middle East and South and South-East Asia.

Frequently asked questions

Which flask does this stopper fit?
Narrow-mouth 250 mL Erlenmeyer flasks.

How many holes does it have?
Two, each 5 mm.

What is it made of?
Premium grade SBR black rubber, 40 ± 5 Duro.

Related products

Related items:

Browse Laboratory Equipment Products or the JaincoLab chemistry lab equipment range.

Request a quote

To order the Rubber Stopper for Erlenmeyer Flask 2 Holes, send the quantity and delivery destination through the JaincoLab contact page or email [email protected]. Institutions and contractors buying under a tender can also reach us via the tenders page.

Last updated: September 2026

   
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Office Address

Jain Scientific Suppliers
2475-84, Hargolal Road,
Ambala Cantt, Haryana, India

[email protected]

+91-85699-09696

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