Caplugs® Evergreen
Plates, PET, Natural — 290-8174-000 | 72/Bag | Caplugs® Evergreen
Plates, PET, Natural — 290-8174-000 | 72/Bag | Caplugs® Evergreen
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8-Well Open Bottom Strips, PS, Natural — 290-8174-000 | 100 Strips/Bag
| Quick Reference — 290-8174-000 | |
|---|---|
| Format | 8-well strip — fits standard 12-position strip frame |
| Bottom | Open (no well floor — bottom of wells is open) |
| Material | Polystyrene (PS) |
| Color | Natural |
| Primary Use | Membrane filter, electrode contact, custom surface assays |
| Strip Frame | Compatible with 290-8103-Z1N HIPS black strip frame |
| Pack Size | 100 strips / Bag (800 open-well positions total) |
| Price | $203.72 / Bag ($0.2038 / strip) |
Technical Narrative
The Caplugs® Evergreen is an open-bottom 8-well PS strip — the strip-format platform for applications requiring physical, optical, or electrical access to the bottom of each well position in a modular 8-well format. Each strip has no well floors, enabling direct contact between well contents and membrane filters (for migration/invasion assays), electrode arrays (for MSD electrochemiluminescence), sensor chip surfaces (for SPR detection), or custom functionalized surfaces bonded to the strip underside. Seats in standard 12-position SBS strip frames (compatible with Caplugs® Evergreen 290-8103-Z1N) for full automation compatibility.
The open-bottom strip delivers the same functional capabilities as the open-bottom 96-well plate (290-8121-010) in a modular 8-well format — enabling strip-count-matched experimental allocation rather than full 96-well plate commitment for assay development and low-sample-count protocols. 100 strips per Bag at $0.2038 per strip provides the per-unit economics for strip-per-condition allocation in assay optimization workflows before scaling to full plates.
At $203.72 per 100-strip Bag — $0.2038 per strip — the provides open-bottom strip access at bulk economics for high-throughput membrane and electrode assay programs.
Technical Specifications — Caplugs® Evergreen
| Specification | Value |
|---|---|
| Part Number | |
| Caplugs Item # | 2908174000E1 |
| Format | 8-well strip |
| Bottom | Open — no well floor; each well open at base |
| Material | Polystyrene (PS) |
| Color | Natural |
| Strip Frame | Compatible with Caplugs® 290-8103-Z1N HIPS frame |
| Sterility | Non-Sterile |
| Pack Size | 100 strips / Bag |
| Wells/Bag | 800 (100 strips × 8 wells) |
| Application | Membrane insert, SPR, electrode, custom surface — strip format |
| BPA/Phthalate | BPA-free; no phthalate plasticizers |
| Country of Origin | Made in U.S.A. (California) |
Open Bottom Strip Application Compatibility —
The open-bottom 8-well strip provides strip-scale access to open-well-bottom applications requiring physical, optical, or electrical access from below:
| Application | Assay / Use | Notes |
|---|---|---|
| Membrane filter strip assays | Cell migration in strip Boyden chamber format | Open bottom accepts membrane filter for migration/invasion assay |
| Electrode contact (strip) | Strip-format MSD electrochemiluminescence | Open bottom required for electrode contact in MSD strip format |
| Custom surface strip assay | Functionalized surface attachment from below | Open bottom enables custom surface chemistry in strip format |
| TIRF imaging (strip format) | Total internal reflection imaging in strip wells | Open bottom allows objective contact for TIRF strip assay |
| Microfluidic strip integration | Microfluidic channel access from strip bottom | Open strip bottom enables microfluidic coupling at strip scale |
| Strip filter plate | Wash-based assay with bottom drainage | Open bottom with membrane filter enables vacuum aspiration |
| Patch clamp (strip format) | Ion channel assay in 8-well strip | Open bottom allows electrode access in strip-format patch clamp |
| Sensor chip strip assay | SPR or biosensor chip contact in strip format | Open bottom for direct sensor chip contact per strip position |
Open-bottom strips have no well containment without a membrane, filter, or bonded surface. Always pair with an appropriate bottom layer before loading liquid. Compatible with the 290-8103-Z1N strip frame for SBS-footprint integration.
Chemical Resistance — Polystyrene (PS)
PS frame resists aqueous assay reagents for surface functionalization and electrode-contact applications.
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers (PBS, TBS, HEPES) | ✓ Excellent |
| Cell culture media | ✓ Excellent |
| DMSO (≤10%) | ✓ Good |
| Short-chain alcohols (brief) | ✓ Good |
| Formalin (4%, brief fixation) | ✓ Good |
| Acetone | ✗ Avoid |
| Autoclave (121°C) | ✗ Not compatible |
Laboratory Applications
The serves cell biology programs running strip-format Boyden chamber cell migration and invasion assays; biosensor programs developing strip-format SPR and electrochemical detection; MSD Meso Scale strip-format electrochemiluminescence assay programs; custom surface functionalization programs in strip format; TIRF and advanced fluorescence imaging in strip wells; and any workflow requiring open-bottom 8-well strip format within a standard SBS strip frame footprint.
U.S. Manufacturing, Quality & Institutional Procurement
Every Caplugs® Evergreen lot is precision-molded at our California manufacturing facility and subject to rigorous dimensional inspection and material purity verification. We supply reference laboratories, hospital systems, biotech firms, and federal procurement offices under institutional pricing programs with blanket-order support and same-day shipping on stocked inventory. Request a sample below to validate before committing to volume.
Frequently Asked Questions — Caplugs® Evergreen
What is the difference between open-bottom strips and round-bottom strips (290-8172-01R)?
Round-bottom strips (290-8172-01R) have U-shaped well floors for liquid containment — suitable for ELISA, cell culture, and agglutination assays. Open-bottom strips have no well floors — the bottom of each position is completely open, enabling membrane filter attachment, electrode contact, sensor chip access, or custom surface integration from below. Open-bottom strips cannot contain liquid without a membrane or surface bonded at the base.
How do I use open-bottom strips with a membrane filter?
Bond or press-fit a porous membrane (PET, polycarbonate, nylon, PTFE) to the open underside of the strip before loading liquid. For Boyden chamber migration assays, apply a membrane with the appropriate pore size (typically 8 µm for cell migration, 3 µm for invasion) to the strip base, add chemoattractant to the well, and seed cells on the membrane surface. Vacuum filtration variants use PTFE or nylon membranes for wash-through applications. Confirm membrane-to-strip compatibility with a sample set before bulk purchase.
Are the open-bottom strips BPA-free?
Yes. Molded from virgin Polystyrene (PS) containing no BPA and no phthalate plasticizers.
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