3.5 mL Long Stem Transfer Pipets — Sterile, LDPE, Natural, 400/Bag (222-1595-02I)
These 3.5 mL long stem transfer pipets from Caplugs® Evergreen are individually sterile-packed and molded from flexible low-density polyethylene (LDPE) for smooth, one-handed aspiration and dispensing. The extended stem is the defining feature, reaching the bottom of 50 mL conical tubes, tall collection tubes, narrow-neck vessels, and deep-well plates where a standard-stem pipet cannot access the container base. Part number 222-1595-02I is supplied 400 per bag, ready for immediate use with no autoclaving required.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 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 per drop |
| Material | Low-Density Polyethylene (LDPE) |
| Color | Natural |
| Sterility | Sterile — individually sterile-packed |
| Pack Size | 400/Bag |
| BPA / Phthalate / Latex | BPA-Free, Phthalate-Free, Latex-Free |
| Country of Origin | USA |
Applications
- Post-centrifuge plasma and serum recovery: The long stem reaches the bottom of 50 mL conical tubes after large-volume centrifugation without tilting or repositioning the tube, preserving layer integrity.
- Blood bank large-volume processing: Complete plasma or cellular material transfer from deep 50 mL tubes in blood bank workflows where full bottom access is essential.
- Tall tube specimen recovery: Extended stem depth allows full aspiration from deep collection tubes in serology and microbiology without contamination from bending or angling the container.
- Microbiology deep tube inoculation: Broth and agar-deep tube inoculation where sterile, precise delivery to the tube bottom is required.
- Narrow-neck bottle and flask dispensing: Long stem geometry threads into narrow-neck containers for controlled reagent or sample addition.
- Deep-well plate aspiration: Reaches the bottom of 2 mL deep-well plate wells for complete aspiration with minimal dead volume.
- Bottom-of-container environmental sampling: Extended reach enables complete sample recovery from the base of tall or narrow collection vessels in field and environmental workflows.
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers and saline | Excellent |
| Serum, plasma, and whole blood | Excellent |
| Dilute acids and bases | Good |
| Alcohols (e.g., ethanol, isopropanol) | Good — short-term contact |
| Biological reagents and culture media | Good |
| Chlorinated solvents (chloroform, DCM) | Not recommended |
| Aromatic solvents (toluene, xylene) | Not recommended |
Quality & Procurement
Made in USA, these Caplugs® Evergreen transfer pipets are produced from FDA-compliant, BPA-free, phthalate-free, and latex-free LDPE resin. Individual sterile packaging eliminates the need for on-site autoclaving and supports single-use sterile technique workflows in clinical, blood bank, and research settings. LabSupplies.com is an authorized Caplugs® Evergreen dealer and ships from USA inventory, typically same business day for stocking items, with volume and institutional pricing available for high-throughput laboratories.
Frequently Asked Questions
Are these transfer pipets individually sterile, or is the bag sterile as a unit?
Each pipet is individually sterile-packed, so sterility is maintained pipet-by-pipet. You can open the bag and remove pipets one at a time without compromising the sterility of the remaining pipets in the bag.
What makes the long stem tip different from a standard transfer pipet?
The long stem extends significantly beyond the bulb, allowing the tip to reach the bottom of tall containers — such as 50 mL conical tubes, deep collection tubes, and narrow-neck flasks — where a standard-stem pipet would fall short and require tilting or repositioning the vessel.
Is LDPE suitable for contact with serum, plasma, and biological reagents?
Yes. LDPE has a low extractable profile and is well established for direct contact with serum, plasma, whole blood, and standard biological reagents. It is not recommended for use with chlorinated or aromatic solvents.
Can these pipets be autoclaved for reuse?
No — LDPE transfer pipets are designed for single use and are not autoclavable. Because each pipet arrives individually sterile-packed, autoclaving is unnecessary for sterile technique applications.