The Pyrex 16x125mm screw cap test tube (often categorized as a culture tube) is a standard laboratory vessel known for its durability and chemical resistance. These tubes typically have a capacity of approximately 15 mL and are made from Code 7740 borosilicate glass to minimize pH changes and leaching.
Corning +4
Corning +4Key Specifications & Features
- Dimensions: Outer diameter of 16 mm and a length of 125 mm (approx. 5 inches).
- Capacity: Approximately 15 mL.
- Material: High-quality borosilicate glass, resistant to thermal shock and chemical attack.
- Screw Cap: Usually supplied with a phenolic screw cap (often black) featuring a GPI 15-415 thread finish.
- Autoclavable: Both the glass tube and phenolic caps are designed to withstand the high temperatures and steam of autoclaving.
- Marking Spot: Many models include a white or blue enamel marking spot for easy labeling with a pencil.Corning +9
Available Options & Where to Buy
- Corning PYREX 15 mL Screw Cap Culture Tubes (9825-16X): This is the standard reusable model. It can be found at Corning’s official e-catalog and through major distributors like Sigma-Aldrich.
- Pyrex Vista Screw Cap Test Tubes: A more economical line that still features the standard 16x125mm dimensions and 15 mL capacity, often sold in packs of 50 through retailers like Mansion Schools.
- Consumer/Small Business Packs: For smaller quantities, 6-packs are available on platforms like Amazon and eBay.
- Disposable vs. Reusable: While the 9825 series is reusable, Pyrex also offers disposable versions (e.g., 99449-16X) which may be sold without caps in bulk quantities.
Amazon.com +5
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