Caplugs® Evergreen
3.5 mL Centrifuge Tubes, Graduated, LDPE, Natural — 222-1595-02I | 400/Bag | Caplugs® Evergreen
3.5 mL Centrifuge Tubes, Graduated, LDPE, Natural — 222-1595-02I | 400/Bag | Caplugs® Evergreen
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Quick Reference
| Part Number | 222-1595-02I |
|---|---|
| Capacity | 3.5 mL |
| Tip Type | Long Stem |
| Tip Detail | extended stem length for reaching the bottom of tall or narrow containers |
| Drop Size | ~40 µL |
| Material | Low-Density Polyethylene (LDPE) |
| Color | Natural |
| Sterility | Sterile — individually sterile-packed |
| Pack Size | 400/Bag |
| Key Use | deep container access — dispensing into tall tubes, narrow vessels, bottom-of-container sample recovery, and extended reach workflows |
| Origin | Made in USA |
| Price | $110.60/Bag ($0.2766/pipet) |
Technical Narrative
The Caplugs® Evergreen 222-1595-02I is a 3.5 mL Long Stem Transfer Pipet, sterile, LDPE (Natural), 400/Bag individually packed. The extended stem reaches the bottom of tall tubes, narrow-neck containers, and deep 50 mL conical tube volumes where a standard-stem pipet cannot access the container base. In blood banking, the long stem allows complete plasma or cell resuspension from the bottom of 50 mL centrifuge tubes after large-volume centrifugation. In serology and microbiology, the long stem reaches specimen material in tall collection tubes without bending or tilting the container.
Low-Density Polyethylene (LDPE): the defining material for transfer pipets — LDPE's flexibility provides progressive, controllable bulb compression for smooth aspirate and dispense with one hand. LDPE's low extractable profile is suited for direct contact with serum, plasma, whole blood, and biological reagents. Sterile individually packed, no autoclaving required. BPA-free, phthalate-free, FDA-compliant,
Procurement economics: $110.60/Bag, $0.2766/pipet. Full 222-15xx transfer pipet series: Standard (222-1577-02I, 45 µL, 500/Bag); Graduated (222-1580-02I, 40 µL, 500/Bag); Blood Bank (222-1585-02I, 40 µL, 500/Bag); Fine Tip (222-1590-02I, 20 µL, 400/Bag); Long Stem (, 40 µL, 400/Bag). LabSupplies.com ships from USA inventory, typically same business day.
Technical Specifications
| Part Number | |
|---|---|
| Caplugs Item # | |
| Capacity | 3.5 mL |
| Tip Type | Long Stem |
| Tip Detail | extended stem length for reaching the bottom of tall or narrow containers |
| Drop Size | ~40 µL per drop |
| Material | Low-Density Polyethylene (LDPE) |
| Color | Natural |
| Sterility | Sterile — individually sterile-packed |
| Pack Size | 400/Bag (3.5 mL long stem transfer pipet, sterile, LDPE, 400/Bag) |
| Primary Application | deep container access — dispensing into tall tubes, narrow vessels, bottom-of-container sample recovery, and extended reach workflows |
| BPA / Phthalate | BPA-Free, Phthalate-Free, Latex-Free |
| Country of Origin | USA |
| Price | $110.60/Bag ($0.2766/pipet) |
3.5 mL Long Stem Transfer Pipet Applications
The is suited to the following laboratory workflows where the long stem tip geometry provides the key advantage.
| Application | Setting / Protocol | Notes |
|---|---|---|
| 50 mL conical tube aspirate | Post-centrifuge plasma/serum aspirate | Reach bottom of 50 mL conical without tilting tube |
| Tall tube specimen recovery | Deep collection tube sample recovery | Extended stem reaches full tube depth |
| Blood bank large-volume | Large-volume plasma or cell transfer | Long stem for 50 mL tube bottom access in blood bank processing |
| Microbiology deep tube | Broth or agar-deep tube inoculation | Long stem for deep tube access without contamination |
| Narrow-neck bottle | Narrow bottle or flask dispensing | Long stem extends into narrow-neck containers |
| Deep well plate | Deep-well plate aspiration (2 mL wells) | Long stem reaches deep well plate bottom |
| Environmental sampling | Bottom-of-container sample recovery | Extended reach for complete residual volume recovery |
Chemical Resistance — Low-Density Polyethylene (LDPE)
Compatibility reference for LDPE at typical laboratory conditions.
| Reagent / Condition | Compatibility | Notes |
|---|---|---|
| Aqueous buffers / saline | Excellent | LDPE inert across pH 4–12; standard biological reagents. |
| Serum / plasma / whole blood | Excellent | Standard biological matrix; low extractables for direct blood contact. |
| Ethanol (<70%) | Good | Short-term compatible for tissue dehydration steps. |
| Methanol (<50%) | Good | Short-term compatible. |
| Acetonitrile | Limited | Avoid prolonged LDPE contact; use LDPE for aqueous protocols. |
| Dichloromethane / chloroform | Not Compatible | Causes swelling; do not use. |
| LISS / PEG enhancement media | Excellent | Compatible with standard blood bank enhancement media. |
| AHG (anti-human globulin) reagent | Excellent | Compatible with standard blood bank AHG reagents. |
Clinical & Research Laboratory Applications
Caplugs® Evergreen 3.5 mL long stem transfer pipets serve blood bank, microbiology, and cell biology laboratories requiring full bottom-of-container access in tall or deep vessels. Blood bank plasma processing laboratories use long stem pipets to aspirate plasma from the bottom of 50 mL conical tubes after large-volume centrifugation — the extended stem reaches the tube base without tilting the tube and risking cell pellet disturbance. Microbiology labs use long stem pipets for deep tube inoculation of semi-solid agar deep tubes, motility test medium, and other deep-tube culture formats where a standard-stem pipet cannot reach the target depth without contaminating the tube wall. Deep-well plate workflows and narrow-neck flask transfers use the long stem for complete residual volume recovery from the container base.
U.S. Manufacturing, Quality & Institutional Procurement
Caplugs® Evergreen products are manufactured in the United States under ISO 9001 quality management from FDA-compliant, food-contact-grade resins. BPA-free, phthalate-free, and latex-free, with material-disclosure documentation supporting CAP, CLIA, and ISO 15189 laboratory accreditation audits.
LabSupplies.com is an authorized dealer for the full Caplugs Evergreen catalog and ships directly from USA inventory — typically same business day for stocking SKUs. We offer below retail pricing on volume orders, tiered institutional and academic pricing, and direct support for grant-funded laboratories and government procurement channels. Lab managers and procurement officers can request a written quote or speak with a product specialist directly from our sales engineering team.
Frequently Asked Questions
Are the transfer pipets sterile?
Yes. Each pipet is individually sterile-packed. Sterility is maintained until the individual wrapper is opened. Single-use — discard after use.
How much longer is the long stem compared to the standard stem?
The long stem extends the total pipet length beyond the standard format, providing additional reach for 50 mL conical tube bottom access and narrow deep-vessel transfer. Exact extension length may vary by lot — contact us for dimensional specifications if a precise minimum depth is required for your application.
Can LDPE transfer pipets be used with organic solvents?
LDPE is compatible with dilute aqueous reagents, serum, plasma, and standard biological matrices. Short-term contact with ethanol (<70%) or methanol (<50%) is generally acceptable. LDPE is not suitable for acetonitrile, acetone, dichloromethane, chloroform, or concentrated organic solvents — use glass or PTFE instruments for organic solvent transfer.
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