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VWR International

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Stoppers

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.


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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.
Catalog Number: 59589-256
Supplier: VWR International


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Catalog Number: 89097-548
Supplier: VWR International


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Description:   XXXX grade. Regular length taper. Assorted, sizes 12-26.
Catalog Number: 23417-000
Supplier: VWR International


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Description:   XXXX Grade. Tapered, 25mm length. Top diameter: 21mm. Bottom diameter: 16mm. Pack of 100.
Catalog Number: 23420-209
Supplier: VWR International


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Description:   Low in free sulfur. Size 5.5 with 5mm diameter hole. Diameter of top: 28mm. Diameter of bottom: 24mm. Length: 25mm.
Catalog Number: 59581-265
Supplier: VWR International


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Description:   Low in free sulfur. Size 8.5 with 5mm diameter hole. Diameter of top: 43mm. Diameter of bottom: 36mm. Length: 25mm.
Catalog Number: 59581-389
Supplier: VWR International


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Description:   XXXX Grade. Tapered, 20mm length. Top diameter: 16mm. Bottom diameter: 12mm. Pack of 100.
Catalog Number: 23420-140
Supplier: VWR International


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Catalog Number: 89097-542
Supplier: VWR International



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Description:   XXXX Grade. Tapered, 38mm length. Top diameter: 41mm. Bottom diameter: 33mm. Pack of 100.
Catalog Number: 23420-479
Supplier: VWR International


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Description:   XXXX Grade. Tapered, 26mm length. Top diameter: 22mm. Bottom diameter: 17mm. Pack of 500.
Catalog Number: 23420-231
Supplier: VWR International


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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.
Catalog Number: 59585-164
Supplier: VWR International


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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.
Catalog Number: 59584-150
Supplier: VWR International


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Description:   High percentage of pure rubber; weigh less than neoprene; low in free sulfur (1/2%). Size: 5. Diameter of top: 27mm. Diameter of bottom: 23mm. Length: 25mm.
Catalog Number: 59580-182
Supplier: VWR International


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Description:   Pure gum. Contain less free sulfur (1/4%) and are less dense than standard black rubber stoppers. Withstand repeated autoclaving. Size: 3. Diameter of top: 24mm. Bottom: 18mm. Length: 25mm.
Catalog Number: 59583-227
Supplier: VWR International


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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: 7.
Catalog Number: 59586-161
Supplier: VWR International


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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
Catalog Number: 89026-340
Supplier: VWR International



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