UNITED SCIENTIFIC SUPPLIES Black Rubber Stopper Size 3 with 2 Holes
The UNITED SCIENTIFIC SUPPLIES Stopper: Rubber is a black rubber stopper in size 3, featuring a bottom diameter of 18 mm, top diameter of 24 mm, and overall height of 25 mm. This stopper includes 2 holes and is…
SKU 3G-OTH-381362
Also listed as: RST3H2 · RST3 H2
Local availability & support
- Delivery
- Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
- Payment
- Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.
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Product Description
The UNITED SCIENTIFIC SUPPLIES Stopper: Rubber is a black rubber stopper in size 3, featuring a bottom diameter of 18 mm, top diameter of 24 mm, and overall height of 25 mm. This stopper includes 2 holes and is manufactured by UNITED SCIENTIFIC SUPPLIES INC under part number RST3-H2.
Frequently Asked Questions
What is a UNITED SCIENTIFIC SUPPLIES rubber stopper size 3 with 2 holes used for?
This black rubber stopper (size 3, 18 mm bottom dia, 24 mm top dia, 25 mm height) seals laboratory flasks, test tubes, or bottles. The 2 holes allow insertion of glass tubing, thermometers, or probes for gas transfer or vacuum applications in chemistry and biology labs.
What are the specifications of the UNITED SCIENTIFIC SUPPLIES RST3-H2 rubber stopper?
The RST3-H2 is a black rubber stopper, size 3, with a bottom diameter of 18 mm, top diameter of 24 mm, and overall height of 25 mm. It has 2 holes and is made by UNITED SCIENTIFIC SUPPLIES INC. The material is rubber, suitable for general-purpose laboratory sealing.
Where to buy UNITED SCIENTIFIC SUPPLIES rubber stoppers worldwide?
3G Electric supplies the UNITED SCIENTIFIC SUPPLIES RST3-H2 rubber stopper to customers worldwide. We handle full logistics, customs clearance, and delivery to your facility. Contact us for a quote and lead time on this lab consumable.
How to select the right rubber stopper size for a flask?
Measure the inside diameter of your flask neck. The stopper's top diameter (24 mm for size 3) should be slightly larger than the neck opening, while the bottom diameter (18 mm) fits inside. Ensure the stopper compresses to form a tight seal. For 2-hole needs, choose a pre-drilled stopper like the RST3-H2.
UNITED SCIENTIFIC SUPPLIES Products
3G Electric supplies UNITED SCIENTIFIC SUPPLIES rubber stoppers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
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