1.8 mL Conical Microcentrifuge Tubes with Tethered Cap — HDPE, Natural, 1000/Bag
These 1.8 mL conical microcentrifuge tubes feature a permanently attached tethered cap and are molded from natural High-Density Polyethylene (HDPE), supplied non-sterile in sealed 1000/Bag packaging. The conical bottom geometry concentrates pellets at the tube tip for complete microvolume recovery with minimal dead volume, while the tethered cap eliminates cap loss and cross-contamination risk during high-throughput pipetting. Part number 214-3439-020 is manufactured to lot-to-lot dimensional tolerances that ensure reliable fit in standard microcentrifuge rotor positions across clinical and research settings.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 214-3439-020 |
| Volume | 1.8 mL |
| Bottom Style | Conical |
| Cap Style | Tethered (permanently attached) |
| Material | High-Density Polyethylene (HDPE) |
| Color | Natural |
| Sterility | Non-Sterile |
| Pack Size | 1000/Bag |
| BPA / Phthalate Free | Yes |
| Country of Origin | USA |
Applications
- PCR preparation and enzyme reactions requiring microvolume conical geometry
- DNA and RNA extraction workflows where low dead volume and complete pellet recovery are critical
- Cell pelleting and microvolume centrifugation in research and clinical laboratories
- Clinical microvolume sample processing in CAP-, CLIA-, and ISO 15189-accredited labs requiring full lot traceability
- Short- and long-term sample storage applications benefiting from HDPE's low moisture vapor transmission
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers / saline | Excellent |
| Dilute acids | Excellent |
| Dilute bases | Excellent |
| Methanol | Compatible |
| Isopropanol | Compatible |
| Acetonitrile | Compatible |
| Aromatic solvents (e.g., toluene, xylene) | Not recommended — verify before use |
Quality & Procurement
Made in USA, these Caplugs® Evergreen microcentrifuge tubes are manufactured from BPA-free, phthalate-free HDPE resin and packaged with lot number and manufacturing date to support full traceability under CAP, CLIA, and ISO 15189 quality requirements. Lot-level quality controls verify consistent conical geometry, wall thickness, and tethered-cap hinge durability across every 1000-tube bag. LabSupplies.com is an authorized Caplugs® Evergreen dealer shipping from domestic USA inventory, so procurement teams avoid the offshore lead-time variability that can disrupt lab operations. Tiered pricing is available for high-volume and grant-funded institutional accounts.
Frequently Asked Questions
Are these microcentrifuge tubes sterile?
No — tubes shipped under part number 214-3439-020 are non-sterile, making them well suited for general molecular biology, cell biology, and clinical chemistry workflows that do not require a sterility guarantee.
What makes a tethered cap better than a separate snap cap?
Because the cap is permanently attached via a flexible hinge, it cannot be misplaced, mixed with caps from other tube types, or accidentally left off a sample. Single-handed open-and-close operation also reduces interruptions during repetitive high-throughput pipetting runs.
Can these tubes be used with standard microcentrifuge rotors?
Yes — the 1.8 mL conical format is dimensionally consistent with standard microcentrifuge rotor positions. Lot-to-lot manufacturing controls are maintained to ensure reliable fit across centrifuge models that accept this tube size.
Are these tubes suitable for regulated clinical laboratories?
Yes — every bag ships with a lot number and manufacturing date, providing the chain-of-custody documentation needed for CAP, CLIA, and ISO 15189 accreditation requirements. The HDPE material is BPA-free and phthalate-free, which is increasingly required by hospital and clinical lab procurement policies.