No‑Additive Plain Tube – 4 mL (Red Top)
This sterile, 4 mL blood collection tube features a red cap and contains no additives or anticoagulants, allowing blood to clot naturally. It is designed for serum separation and is ideal for a wide range of clinical and laboratory applications, including biochemistry, serology, immunology, and routine diagnostic testing.
These tubes ensure sample integrity, reliable results, and safe handling, making them suitable for hospitals, laboratories, and diagnostic centers. They are compatible with standard vacuum blood collection systems and are often used when pure serum is required for accurate laboratory analysis.
Key Features:
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Sterile, single-use plain tube
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4 mL capacity
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Red stopper, no additive
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Enables natural clotting for serum separation
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Compatible with vacuum collection systems
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Ideal for routine chemistry, serology, and immunology testing
