Home » Our Product » Lab Equipment » Labware » Red Rubber Stoppers Two Hole 31mm

Red Rubber Stoppers Two Hole 31mm

Product Code : EL-L-11354

Quick Answer: The Red Rubber Stoppers Two Hole 31mm are size 31 red rubber stoppers with two 5 mm holes, 31 mm across the bottom, 36 mm across the top and 35 mm long.

Last updated: October 2026

Key Features

Two holes, each 5 mm in diameter
Bottom 31 mm, top 36 mm, length 35 mm
Shore hardness in the 46-55 range
Bottom diameter moulded on the top face
Size 31: for 100 ml economy flasks, 250-500 ml conical flasks and 250 ml side arm flasks

Technical Specifications

Specification	Value
Bung type	Two hole
Hole diameter	5 mm
Size	31
Bottom diameter	31 mm
Top diameter	36 mm
Length	35 mm
Shore hardness	46-55

About This Product

This two-hole stopper in red rubber fits size 31 necks, including 100 ml economy flasks, conical flasks of 250-500 ml and 250 ml side arm flasks. Glass can be passed through each of its two 5 mm holes, but extreme care must be used when inserting glass into them.

Frequently Asked Questions

Q1. Which flasks does a size 31 stopper suit?
Size 31 stoppers suit economy flasks of 100 ml, conical flasks of 250-500 ml and side arm flasks of 250 ml.

For a quotation on the Red Rubber Stoppers Two Hole 31mm, contact School Equipments India.

Supply of Red Rubber Stoppers Two Hole 31mm from to Finland, France, Tanzania, Thailand, Sri Lanka, Congo, Costa Rica, Ivory Coast, Croatia, Cuba, Cyprus, Czech Republic, Denmark, Djibouti, Dominica, Afghanistan, Albania, Algeria, Andorra, Angola, Antigua and Barbuda, Argentina, Armenia, Australia, Austria, Azerbaijan, Bahamas, Bahrain, Bangladesh, Barbados, United Arab Emirates (UAE, Dubai), United Kingdom (London), United States, Uruguay, Uzbekistan, Vanuatu, Belarus, Belgium, Belize, Benin, Bhutan, Bolivia, Bosnia and Herzegovina, Botswana, Brazil, Brunei, Bulgaria, Burkina Faso, Burma Myanmar, East Timor, Ecuador, Egypt, El Salvador, Equatorial Guinea, Eritrea, Estonia, Ethiopia (Addis Ababa), Fiji, Burundi, Cambodia, Cameroon, Canada, Cape Verde, Central African Republic, Chad, Chile, Colombia. Math Teaching Kit suppliers in Luxembourg, Macedonia, Madagascar, Malawi (Lilongwe), Malaysia (Kuala Lumpur), Maldives, Mali, Malta, Marshall Islands, Mauritania, Mexico, Micronesia, Moldova, Monaco, Mongolia, Montenegro, Morocco, Mozambique, Namibia, Comoros, Congo. Math Teaching Kit manufacturers in Dominican Republic, Gabon, Gambia, Georgia, Germany, Ghana, Greece, Grenada, Guatemala, Guinea, Guinea-Bissau, Guyana, Haiti, Honduras, Hungary, Iceland, Indonesia, Iran, Iraq, Niger, Nigeria (Abuja), Norway, Oman, Palau, Panama, Papua New Guinea, Paraguay, Peru, Philippines (Manila), Poland, Ireland, Israel, Italy, Jamaica, Japan, Jordan, Kazakhstan, Kenya (Nairobi), Kiribati, Korea, Kuwait, Kyrgyzstan, Laos, Latvia, Lebanon, Lesotho, Liberia, Liechtenstein, Lithuania, Mauritius, Nauru, Nepal, Netherlands, New Zealand, Nicaragua, Portugal, Qatar, Romania, Russia, Rwanda (Kigali). Math Teaching Kit exportets to Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Samoa, San Marino, Sao Tome and Principe, Saudi Arabia, Senegal, Serbia, Seychelles, Sierra Leone, Singapore, Slovakia, Slovenia, Solomon Islands, Somalia, South Africa, South Sudan, Spain, Sudan, Suriname, Swaziland, Sweden, Switzerland, Syria, Tajikistan, Togo, Tonga, Trinidad and Tobago, Tunisia, Turkey, Turkmenistan, Tuvalu, Uganda (Kampala), Ukraine, Venezuela, Vietnam, Yemen , Zambia (Lusaka), Zimbabwe

Red Rubber Stoppers Two Hole 31mm

Key Features

Technical Specifications

About This Product

Frequently Asked Questions

Appliances

Biology

Physics

Environmental Science

Lab Equipment

Glassware, Plastics & Ceramics

Chemistry

Primary Science

General Lab Equipment

Educational

Maths

Science

Office Address

Quick Links

Follow Us