Rubber Stopper
Product Code : JL-LEP-10273
The Rubber Stopper (SKU JL-LEP-10273) seals 16 mm diameter test tubes and similar glassware. It is a tapered cylinder of premium grade SBR black rubber, at least 25 mm high with a 17 mm top and 13 mm bottom diameter, and it has a 5 mm bored hole for a glass tube or thermometer. With a hardness of 40 ± 5 Duro, the rubber stopper grips firmly yet can be pushed in and eased out without cracking the glass. Dimensions are held to ±0.5 mm. JaincoLab supplies it as per DepEd guidelines.
Specifications
The stopper is specified by shape, material, size and hardness: tapered cylinder of SBR black rubber, at least 25 mm high, 17 mm top and 13 mm bottom diameter, a 5 mm hole, ±0.5 mm tolerance and 40 ± 5 Duro.
| Product | Rubber Stopper |
| SKU | JL-LEP-10273 |
| Shape | Cylindrical with a tapered bottom end |
| Material | Premium grade SBR black rubber compound |
| Height | 25 mm (min) |
| Top diameter | 17 mm (min) |
| Bottom diameter | 13 mm (min) |
| Hole diameter | 5 mm (min) |
| Tolerance | ±0.5 mm on height, top and bottom diameter |
| Hardness | 40 ± 5 Duro |
| Specification reference | As per DepEd guidelines |
Applications of the rubber stopper
The stopper is used to close test tubes while passing a tube or thermometer through. Typical uses are:
- Sealing 16 mm test tubes
- Fitting delivery tubes for gas collection
- Holding a thermometer in a boiling tube
- Closing small glassware in simple set-ups
Scope of supply and ordering
The listing covers rubber stoppers as described in the specification table; quantities per pack are confirmed on the quotation. Tubing and test tubes 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 tubes does the Rubber Stopper fit?
16 mm diameter test tubes and similar glassware.
How large is the hole?
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, send the quantity and delivery destination through the JaincoLab contact page or email [email protected]. Tender and project enquiries can be sent through the tenders page.
