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Our solutions, developed with you as our focus, are crafted by our team and network of professionals with advanced degrees in science, quality control, engineering, manufacturing and industry experience.
Avantor supports end-to-end fluid management solutions – including peristaltic pumps and aseptic fluid transfer solutions – that are reliable and customer-centric, helping bioprocessing manufacturers meet their research and production goals.
A strong, vibrant research and development group is the lifeblood of all industries. VWR will support you from the latest life science products to the guaranteed purity of organic building blocks...
VWR is ready to support your production facility with reliable access to raw materials and essential supplies. We can also help you increase productivity...
VWR is proud of our years of experience providing choice and excellent service to the Industrial market from Food & Beverage, Petrochemical, Environmental Testing, Waste Water, Cosmetics, Consumer Goods, Agriculture and more...
VWR is your complete source for workplace supplies. Binders, calendars, pens, cleaning and sanitation supplies, and office equipment are just some of the essential products we offer...
New Avantor® J.T.Baker® premium conductive and non-conductive robotic tips deliver superior quality and reliable performance for results you can trust.
Avantor Services provides a wide range of specialized services and digital solutions to help you solve complex challenges.
We’ve built our reputation on consistent, comprehensive mastery of day-to-day operations, allowing lab, clinical, and production environments to focus their high-value resources on core scientific priorities.
As our customers’ needs have evolved, so have our capabilities. We have become experts in scientific operations, improving performance with sophisticated solutions and providing guidance on best practices.
You can select and customize services for peak efficiency, quality, and accelerated innovation.
Leak-proof, solid stoppers seal bottles, flasks, vials, and even tubing to prevent liquids and gases escaping. Multi-hole styles provide the limited flow stability conditions desired in order to prevent air bubble build up. With a slightly tapered design, different diameter sized stoppers are inserted in labware for a snug fit that still allows easy removal. The closures are manufactured in different materials for accurate resistance to harsh contents and can maintain vacuum atmosphere.
Description:
Pure gum. Contain less free sulfur (1/4%) and are less dense than standard black rubber stoppers. Withstand repeated autoclaving. Size: 4. Diameter of top: 26mm. Bottom: 20mm. Length: 25mm.
Description:
High resiliency, pure gum. Less free sulfur (1/4%) and lower density than standard black rubber stoppers. Holes facilitate laboratory usage. Size: 10. Diameter of top: 50mm. Bottom: 42mm. Hole diameter: 5mm.
Description:
High resiliency, pure gum. Less free sulfur (1/4%) and lower density than standard black rubber stoppers. Added hole facilitates laboratory usage. Size: 11. Diameter of top: 56mm. Bottom: 48mm. Hole diameter: 5mm.
Description:
Contain no free sulfur and exhibit good resiliency. Withstand petroleum products and oils as well as most inorganic acids and bases. Size: 0. Diameter of top: 17mm. Bottom: 13mm. Length 25mm.
Description:
Low in free sulfur. Size 8 with 5mm diameter hole. Diameter of top: 41mm. Diameter of bottom: 33mm. Length: 25mm. Approximately 14 stoppers per pound. 5 lbs per case.
Description:
High percentage of pure rubber; weigh less than neoprene; low in free sulfur (1/2%). Size: 13.5. Diameter of top: 75mm. Diameter of bottom: 62mm. Length: 35mm.
Description:
High percentage of pure rubber; weigh less than neoprene; low in free sulfur (1/2%). Size: 10. Diameter of top: 50mm. Diameter of bottom: 42mm. Length: 25mm.
Description:
Pure gum. Contain less free sulfur (1/4%) and are less dense than standard black rubber stoppers. Withstand repeated autoclaving. Size: 12. Diameter of top: 64mm. Bottom: 54mm. Length: 25mm.
Description:
High percentage of pure rubber; weigh less than neoprene; low in free sulfur (1/2%). Size: 6.5. Diameter of top: 34mm. Diameter of bottom: 27mm. Length: 25mm.
Description:
Contain no free sulfur and exhibit good resiliency. Withstand petroleum products and oils as well as most inorganic acids and bases. Size: 9. Diameter of top: 45mm. Bottom: 37mm. Length 25mm.
Description:
High percentage of pure rubber; weigh less than neoprene; low in free sulfur (1/2%). Size: 2. Diameter of top: 20mm. Diameter of bottom: 16mm. Length: 25mm.
Description:
Contain no free sulfur and exhibit good resiliency. Withstand petroleum products and oils as well as most inorganic acids and bases. Size: 3. Diameter of top: 24mm. Bottom: 18mm. Length 25mm.
Description:
Pure gum. Contain less free sulfur (1/4%) and are less dense than standard black rubber stoppers. Withstand repeated autoclaving. Size: 9. Diameter of top: 45mm. Bottom: 37mm. Length: 25mm.
Description:
Twistit*. Three twist-off seals permit easy conversion from a solid to a one, two or three-hole stopper. Soft, resilient, natural, white rubber withstands repeated autoclaving. Size: 6.
Description:
High resiliency, pure gum. Less free sulfur (1/4%) and lower density than standard black rubber stoppers. Added hole facilitates laboratory usage. Size: 8. Diameter of top: 41mm. Bottom: 33mm. Hole diameter: 5mm.
Description:
Contain no free sulfur and exhibit good resiliency. Withstand petroleum products and oils as well as most inorganic acids and bases. Size: 7. Diameter of top: 37mm. Bottom: 30mm. Length 25mm.
Description:
Designed to fit 800ml flasks. Low free-sulfur content (1/2%), lower density than neoprene, and excellent resiliency and pliability. 8mm diameter hole; 39mm top diameter; 28mm bottom diameter; 35mm length.
Description:
Pure gum. Contain less free sulfur (1/4%) and are less dense than standard black rubber stoppers. Withstand repeated autoclaving. Size: 00. Diameter of top: 15mm. Bottom: 10mm. Length: 25mm.
Description:
Contain no free sulfur and exhibit good resiliency. Withstand petroleum products and oils as well as most inorganic acids and bases. Size: 10. Diameter of top: 50mm. Bottom: 42mm. Length 25mm.
Description:
High resiliency, pure gum. Less free sulfur (1/4%) and lower density than standard black rubber stoppers. Added hole facilitates laboratory usage. Size: 0. Diameter of top: 17mm. Bottom: 13mm. Hole diameter: 3mm.
Description:
High resiliency, pure gum. Less free sulfur (1/4%) and lower density than standard black rubber stoppers. Added hole facilitates laboratory usage. Size: 12. Diameter of top: 64mm. Bottom: 54mm. Hole diameter: 5mm.
Description:
High resiliency, pure gum. Less free sulfur (1/4%) and lower density than standard black rubber stoppers. Holes facilitate laboratory usage. Size: 3. Diameter of top: 24mm. Bottom: 18mm. Hole diameter: 5mm.
Description:
High resiliency, pure gum. Less free sulfur (1/4%) and lower density than standard black rubber stoppers. Added hole facilitates laboratory usage. Size: 2. Diameter of top: 20mm. Bottom: 16mm. Hole diameter: 5mm.
Description:
High resiliency, pure gum. Less free sulfur (1/4%) and lower density than standard black rubber stoppers. Added hole facilitates laboratory usage. Size: 7. Diameter of top: 37mm. Bottom: 30mm. Hole diameter: 5mm.
Description:
Operates at high vacuum - transverse trapezoidal sealing rings . Self-releasing versions available on request. Use up to 280C (540F). Leakage Rate < 1 x 10-4 torr, liter, sec-1. 24/40 Joint Size
Description:
High percentage of pure rubber; weigh less than neoprene; low in free sulfur (1/2%). Size: 1. Diameter of top: 19mm. Diameter of bottom: 14mm. Length: 25mm.
Description:
High resiliency, pure gum. Less free sulfur (1/4%) and lower density than standard black rubber stoppers. Added hole facilitates laboratory usage. Size: 6. Diameter of top: 32mm. Bottom: 26mm. Hole diameter: 5mm.
Description:
VWR* Black Rubber Stoppers, Solid High percentage of pure rubber; weigh less than neoprene; low in free sulfur (1/2%). Size: 12. Diameter of top: 64mm. Diameter of bottom: 54mm. Length: 25mm.
Description:
Twistit*. Three twist-off seals permit easy conversion from a solid to a one, two or three-hole stopper. Soft, resilient, natural, white rubber withstands repeated autoclaving. Size: 5.
Description:
Twistit*. Three twist-off seals permit easy conversion from a solid to a one, two or three-hole stopper. Soft, resilient, natural, white rubber withstands repeated autoclaving. Size: 8.
Stoppers
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