Microhematocrit Capillary Tubes, 100% Plastic, Color-Coded — 1000 Tubes/Vial The Globe Scientific Microhematocrit Capillary Tubes are 100% plastic, shatter-resistant tubes engineered for safe packed-cell-volume (PCV) determination and capillary blood handling. Color coding by tube simplifies protocol identification at the bench, while the all-plastic construction eliminates the breakage and biohazard exposure associated with glass capillaries during fingerstick collection and centrifugation. Technical Specifications Product Type Microhematocrit Capillary Tube Volume/Size Standard microhematocrit format (~75 mm length) Material 100% Plastic, shatter-resistant Closure/Cap Open-ended capillary (compatible with sealing clay) Graduation None (read with microhematocrit reader) Sterility Non-sterile Pack Size 1000 tubes per vial Available Colors Color SKU Price (per vial of 1000) Red Tip, Sodium Heparinized — Box of 1000 51686 $293.60 Green Tip, Ammonium Heparinized — Box of 1000 51684 $293.60 Blue Tip, Plain — Box of 1000 51680 $293.60 Applications Microhematocrit (packed cell volume) determination after centrifugation Capillary blood collection from fingerstick or heelstick samples Color-coded sorting of patient or assay groups at the bench Point-of-care hematology testing in clinical and research labs Veterinary PCV analysis on small-volume blood draws Teaching and training labs where glass breakage poses a safety risk Chemical Resistance Reagent Class Compatibility Aqueous buffers Excellent Dilute acids Good Dilute bases Good Alcohols Good Acetonitrile Limited Aromatic solvents Not recommended Chlorinated solvents Not recommended Quality & Procurement Purchased through labsupplies.com, an authorized Globe Scientific dealer shipping from US inventory. Each vial carries a lot number to support traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. Institutional and grant-funded tiered pricing is available — contact our procurement team for volume quotes across all three color SKUs. Frequently Asked Questions Are these capillary tubes heparinized? These tubes are the 100% plastic plain (non-heparinized) configuration. For anticoagulated capillary collection, confirm the required heparin-coated variant with our team before ordering. Why choose plastic over glass microhematocrit tubes? All-plastic tubes are shatter-resistant, which reduces the risk of cuts and bloodborne-pathogen exposure during fingerstick collection and centrifugation. They are well suited to teaching labs and high-throughput settings. How are the tubes sealed before centrifugation? Open-ended microhematocrit tubes are typically sealed at one end with standard capillary sealing clay or putty prior to spinning, then read against a microhematocrit reader card. What does the color coding indicate? Color (red, green, or blue) is provided for visual identification and bench organization rather than a chemical additive designation. Choose colors to match your internal sample-tracking protocol. { "@context": "https://schema.org", "@type": "Product", "name": "Microhematocrit Capillary Tubes, 100% Plastic", "brand": {"@type": "Brand", "name": "Globe Scientific"}, "description": "Globe Scientific 100% plastic, shatter-resistant microhematocrit capillary tubes for packed cell volume determination. 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For anticoagulated capillary collection, confirm the required heparin-coated variant with our team before ordering."}}, {"@type": "Question", "name": "Why choose plastic over glass microhematocrit tubes?", "acceptedAnswer": {"@type": "Answer", "text": "All-plastic tubes are shatter-resistant, which reduces the risk of cuts and bloodborne-pathogen exposure during fingerstick collection and centrifugation. 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