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UNITED SCIENTIFIC RST2-S Solid Rubber Laboratory Stoppers

Rst2-s United Scientific Qty 3 Size #2 Solid Rubber Laboratory Stoppers

( Brand: United Scientific ), ( Type: Laboratory Stoppers ), ( Manufacturer Part Number: RST2-S ), ( Country Of Origin: China )

Review UNITED SCIENTIFIC Qty Size #2 Solid Rubber Laboratory Stoppers

The United Scientific RST2-S Solid Rubber Laboratory Stoppers are an essential addition to any laboratory setup, offering superior functionality and durability. These stoppers are meticulously crafted from high-quality solid natural rubber, ensuring they provide an airtight seal and maintain the integrity of your laboratory containers.

The RST2-S stoppers exhibit a sleek and modern design, featuring a smooth, uniform surface free from any rough edges or imperfections. Their dimensions are specifically engineered to fit standard laboratory glassware, including flasks, beakers, and bottles, with a diameter of approximately 3.2 inches and a height of 2.2 inches.

The natural rubber material used in the construction of these stoppers offers several advantages. It is an excellent insulator, making it suitable for use with temperature-sensitive liquids, as it helps maintain the temperature inside the container. Furthermore, natural rubber is a flexible material that can adapt to the contours of the container, ensuring a snug and secure fit.

The United Scientific RST2-S Solid Rubber Laboratory Stoppers are easy to clean and maintain. The smooth, non-porous surface allows for efficient cleaning with common laboratory detergents and water. Additionally, the robust nature of the natural rubber material ensures the stoppers can withstand repeated use and cleaning without showing signs of wear and tear.

These stoppers are compatible with a wide range of laboratory applications and can be used in various environments, including those involving corrosive or acidic substances. Their durability and resistance to such conditions make them a reliable choice for laboratories handling harsh chemicals.

In conclusion, the United Scientific RST2-S Solid Rubber Laboratory Stoppers are a must-have for any laboratory setup, providing an airtight seal, insulation, and ease of use. Their high-quality construction from natural rubber ensures they can withstand the rigors of laboratory use and maintain their performance over time.

United Scientific RST2-S solid rubber laboratory stoppers are commonly used in various scientific applications due to their durability and resistance to chemicals. Here are some pros and cons of buying these stoppers:

Pros:

1. Chemical Resistance: These stoppers are made of solid natural rubber, which is highly resistant to most organic and inorganic chemicals. This makes them ideal for use in laboratories where various chemicals are being handled.

2. Durability: The solid rubber material makes these stoppers very durable and long-lasting. They can withstand frequent use and can handle heavy loads without getting damaged easily.

3. Compatibility: These stoppers are compatible with most laboratory glassware, including round-bottomed flasks, conical flasks, and beakers.

4. Easy to Use: The stoppers are easy to insert and remove from the glassware due to their smooth and flexible surface.

5. Affordable: Compared to other types of laboratory stoppers, such as glass or PTFE stoppers, solid rubber stoppers are relatively affordable.

Cons:

1. Not Suitable for Strong Acids and Bases: While solid rubber stoppers are resistant to most chemicals, they are not suitable for strong acids and bases, as they can cause the rubber to swell or dissolve.

2. Absorption of Volatiles: Solid rubber stoppers can absorb volatile organic compounds (VOCs) and other gases, which can affect the accuracy of some experiments.

3. Limited Temperature Range: Solid rubber stoppers have a limited temperature range, and they should not be used in extreme temperatures, as they can become brittle or soft.

Conclusion:

United Scientific RST2-S solid rubber laboratory stoppers are an excellent choice for most laboratory applications due to their durability, chemical resistance, ease of use, and affordability. However, they are not suitable for use with strong acids and bases, and they can absorb volatiles and other gases. Therefore, it is essential to consider the specific requirements of your experiment before choosing these stoppers.

Recommendation:

If you are looking for laboratory stoppers for general use in a wide range of applications, then United Scientific RST2-S solid rubber stoppers are an excellent choice. However, if you are working with strong acids and bases or need to exclude volatiles and other gases from your experiment, then you may want to consider other types of laboratory stoppers, such as glass or PTFE stoppers.

Details:

Please inquire for pricing prior to purchase. Money Back or exchange guaranteed. UPS Next Day Air may be available for orders over $500 at an extra cost. 1 00% Genuine Us A E L R.

part #: rst2 prices

  • $11.90-$30.99

specifications vesselveep:

  • brand: United Scientific
  • type: Laboratory Stoppers
  • manufacturer part number: RST2-S
  • country of origin: China

returns vesselveep:

  • policy: Returns Accepted
  • time: 30 Days
  • paid by: Seller

shipping vesselveep:

  • class: Standard
  • type: Fixed
  • cost: $0.00
  • transit: 3-8 Days
  • service: USPS Ground Advantage
  • carrier: USPS

seller vesselveep:

  • rating: 99.7%
  • # reviews: 73830
  • city: North Salt Lake, Utah

general vesselveep:

  • Parts Accessories > Boat Parts > Other
  • condition: New other see details

offer vesselveep:

  • availability: In Stock
  • options: Ship-to-home
  • best offers: True
  • quantity: 1
  • started: May 19, 2026
  • sold: 0

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  • other
type: laboratory stoppers, country of origin: china,
sku: 14783939966315752,
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3 offers $11.90–$30.99 USD
  • New other (see details). Offer #1 priced at $30.99 + $0.00 delivery = $30.99* total. FREE SHIPPING
  • New. Offer #2 priced at $12.10 + $6.99 delivery = $19.09* total. Stopper, Stopper Size 2, Neck Size 25 mm, Screw Closure Size 25mm, Bottom Diameter 16 mm, Top Diameter 20 mm, Overall Height 25 mm, Material Natural Rubber, Product Type Stopper, Color Black, Autoclavable Yes, Number of Holes 0, Standards Not Applicable, Special Features Low Sulfur Content, Withstand Temperatures From - 25 to 70 Degrees C (-13 to 158 Degrees F), Resists Abrasion and Water, For Labware Type Erlenmeyer Flasks, Test Tubes, Liner Material Natural Rubber, Package Quantity 45.+$6.99 shipping
  • New. Offer #3 priced at $11.90 + $6.99 delivery = $18.89* total. Stopper, Stopper Size 2, Neck Size 25 mm, Screw Closure Size 25mm, Bottom Diameter 16 mm, Top Diameter 20 mm, Overall Height 25 mm, Material Natural Rubber, Product Type Stopper, Color Black, Autoclavable Yes, Number of Holes 1, Standards Not Applicable, Special Features Low Sulfur Content, Withstand Temperatures From - 25 to 70 Degrees C (-13 to 158 Degrees F), Resists Abrasion and Water, For Labware Type Erlenmeyer Flasks, Test Tubes, Liner Material Natural Rubber, Hole Diameter 5 mm.+$6.99 shipping

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