Rubber Stopper uxcell 32pcs Black Silicone Lab Stoppers 5.3mm Plug

Description

Product Overview

The uxcell 32 piece black rubber stopper collection is engineered for precision, durability, and versatility in demanding laboratory environments. Each stopper is crafted from premium grade silicone rubber, a material celebrated for its exceptional temperature resistance, chemical inertness, and flexibility. This silicone formulation can endure temperatures up to 250°C, making it suitable for a wide range of thermal applications, from routine incubations to high‑heat sterilization processes. The stoppers are sized to accommodate plug holes ranging from 5 mm to 5.3 mm, providing a snug fit that eliminates gaps and prevents unwanted ingress of liquids, gases, dust, or vapor. The black coloration not only offers a professional aesthetic but also helps conceal any minor staining that may occur during routine use, preserving the visual integrity of the laboratory setup.

Dimensions of the entire package are carefully considered for efficient storage and handling. The box measures 3.58 x 2.4 x 0.63 inches and weighs only 0.352 ounces, allowing for easy stacking on shelves or in cabinets without adding significant weight. The packaging includes clear labeling of each stopper size, enabling quick identification and selection during experiments. The product carries the reputable uxcell brand, known for delivering reliable scientific consumables that meet stringent quality standards. With a best‑seller rank of #16 in Lab Rubber Stoppers on major e‑commerce platforms, this set has earned the trust of researchers worldwide.

Usage

These silicone stoppers are ideal for a broad spectrum of laboratory applications. In chemistry labs, they serve as reliable seals for reaction vessels, distillation apparatus, and reflux condensers, ensuring that volatile compounds remain contained and that pressure differentials are safely managed. In biology and microbiology settings, the stoppers protect culture flasks, petri dishes, and bioreactors from contamination, maintaining sterile conditions essential for accurate results. The high temperature tolerance allows the stoppers to be used in autoclave cycles, where they can withstand the intense heat without deforming or releasing harmful substances into the sample. Additionally, the chemical resistance of silicone makes these stoppers compatible with a variety of solvents, acids, and bases, reducing the risk of material degradation or leaching.

Beyond traditional laboratory equipment, the stoppers can be employed in industrial quality‑control processes, environmental testing rigs, and even educational settings where durability and safety are paramount. Their ease of installation—simply press the stopper into the corresponding hole or use a gentle twisting motion—means that technicians can quickly replace worn components without specialized tools. For applications requiring a tighter seal, the stoppers can be gently adjusted with a standard screwdriver or similar instrument, providing additional firmness without compromising the integrity of the silicone material.

Why Choose Us

Choosing the uxcell silicone stopper set means investing in a product that combines material excellence with thoughtful design. The silicone rubber used is sourced from suppliers who adhere to ISO‑9001 quality management systems, guaranteeing consistency across each batch. Each stopper undergoes rigorous testing for dimensional accuracy, temperature endurance, and chemical compatibility, ensuring that the performance specifications are met or exceeded. The brand’s commitment to customer satisfaction is reflected in responsive after‑sales support, where technical queries are addressed promptly by knowledgeable staff. Moreover, the product’s competitive pricing—just $6.99 for a 32‑piece set—offers exceptional value without sacrificing quality, making it an economical choice for laboratories operating under tight budgets.

Environmental responsibility is also a core principle of uxcell. The silicone material is recyclable where facilities exist, and the manufacturing process minimizes waste by employing precision molding techniques. Users can feel confident that their purchase aligns with sustainable practices, reducing the overall ecological footprint of their laboratory operations.

Key Features

• Premium silicone rubber provides high temperature resistance up to 250°C, ensuring reliable performance in heat‑intensive procedures.
• Precise sizing for 5 mm to 5.3 mm plug holes delivers a tight, leak‑free seal that protects samples from contamination.
• Chemical‑inert composition resists degradation from acids, bases, and solvents, extending the lifespan of each stopper.
• Compact, lightweight packaging simplifies storage and handling, allowing labs to keep essential supplies readily accessible.
• Dedicated customer support and a clear warranty policy give users confidence and peace of mind after purchase.

FAQ

What temperature range can these silicone stoppers withstand?

The stoppers are rated for continuous use up to 250°C, making them suitable for most laboratory heating applications, including autoclaving and hot plate experiments.

Are the stoppers compatible with organic solvents?

Yes, the silicone material is chemically inert and resistant to a wide variety of organic solvents, acids, and bases, ensuring that the stoppers will not degrade or leach contaminants into your samples.

How do I achieve a tighter seal if the stopper feels loose?

If a tighter fit is needed, gently press the stopper into the hole using a small screwdriver or similar tool. The flexible silicone will conform to the surface, increasing friction and creating a more secure seal.

Can these stoppers be reused after autoclaving?

Absolutely. The high temperature resistance of the silicone allows the stoppers to be autoclaved multiple times without loss of elasticity or structural integrity, making them a cost‑effective reusable option.

What is the warranty or return policy for this product?

uxcell offers a 30‑day satisfaction guarantee. If the stoppers arrive damaged or do not meet the described specifications, customers can contact support for a replacement or refund.