Caplugs® Evergreen
Vial Caps, HDPE, Yellow — 300-3910-FY20 | 200/Bag | Caplugs® Evergreen
Vial Caps, HDPE, Yellow — 300-3910-FY20 | 200/Bag | Caplugs® Evergreen
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Flat Top MST™ Cryogenic Vial Caps, HDPE, Yellow — 300-3910-FY20 | 200/Bag
| Quick Reference — 300-3910-FY20 | |
|---|---|
| Sub-brand | MST™ (Caplugs® Evergreen) |
| Cap Profile | Flat Top — distinct from CryoSure® dome-top |
| Material | High-Density Polyethylene (HDPE) |
| Color | Yellow |
| Cryo Rating | ✓ LN₂ vapor phase (-196°C) and immersion |
| Color Use | Yellow MST™ caps correspond to the CLSI H3 SPS/ACD conventio |
| vs CryoSure® | MST™ flat top for MST™ vials only |
| Pack Size | 200/Bag |
| Price | $19.78 / Bag ($0.0989 / cap) |
Technical Narrative
The Caplugs® Evergreen MST™ is a yellow HDPE flat-top cryogenic vial cap for MST™ cryogenic vials, rated for LN₂ vapor phase (-196°C), LN₂ immersion, and -80°C storage. Yellow MST™ caps correspond to the CLSI H3 SPS/ACD convention — designating blood culture and ACD-preserved cryogenic specimens in MST™ vial cryo box programs.
MST™ caps use a flat-top profile distinct from CryoSure® dome-top caps — improving stacking density in cryo boxes and providing a consistent flat surface for robotic cap handling systems. All 12 MST™ colors are uniformly priced at $19.78/200-bag. MST™ caps are not interchangeable with CryoSure® vials — always match cap series to vial series.
At $19.78 per 200/Bag — $0.0989 per cap.
Technical Specifications — Caplugs® Evergreen
| Specification | Value |
|---|---|
| Part Number | |
| Caplugs Item # | 3003910FY20E1 |
| Sub-brand | MST™ (Caplugs® Evergreen) |
| Cap Profile | Flat Top |
| Material | High-Density Polyethylene (HDPE) |
| Color | Yellow |
| Cryo Rating | LN₂ vapor phase and immersion (-196°C) |
| Storage | ✓ -80°C and -196°C compatible |
| Autoclave | ✓ Compatible (121°C / 15 psi) |
| vs CryoSure® | Different thread and cap profile — MST™ vials only |
| Pack Size | 200/Bag |
| BPA/Phthalate | BPA-free; no phthalate plasticizers |
| Country of Origin | Made in U.S.A. (California) |
MST™ Flat Top Cap Compatibility — Yellow
The MST™ flat-top cap fits MST™ cryogenic vials for:
| Application | Use / Storage | Notes |
|---|---|---|
| Cryo vial capping (flat top) | MST™ cryogenic vials | Flat top — distinct from CryoSure® dome-top |
| LN₂ vapor phase archive | Biobank LN₂ vapor phase at -196°C | HDPE engineered for LN₂ temperatures |
| -80°C mechanical freezer | Ultra-low temp biorepository | HDPE cryo stability |
| Light attenuation (Amber) | Semi-light-sensitive specimen storage | Amber cap: partial UV/visible attenuation |
| Color-coded cryo routing | Multi-specimen cryo box organization | 12 colors including Chocolate and Amber |
| Flat-top cryo box stacking | High-density cryo box programs | Flat top improves stacking vs dome-top |
| Automated cap handling | Robotic cryo vial programs | Flat profile for consistent robotic engagement |
| Replacement cap supply | Replacing lost/damaged MST™ vial caps | Thread specific to MST™ vials only |
MST™ caps are for MST™ vials only — not interchangeable with CryoSure® vials. Validate fit with a sample before bulk purchase.
Chemical Resistance — HDPE MST™ Cryogenic Grade
MST™ HDPE maintains integrity from +121°C autoclave through -196°C LN₂.
| Reagent / Condition | Compatibility |
|---|---|
| Liquid nitrogen (-196°C) | ✓ Engineered for LN₂ vapor + immersion |
| Storage at -80°C | ✓ Excellent — HDPE cryo-toughened |
| DMSO (cryoprotectant conc.) | ✓ Good — 5–10% standard cryo media |
| Aqueous cryoprotectants | ✓ Excellent |
| Autoclave (121°C) | ✓ Compatible |
| Concentrated organic solvents | ✗ Not recommended |
Complete MST™ Cap Range — 12 Colors
All 12 colors in 200/Bag at $19.78. Chocolate (FM20) and Amber (FN20) are exclusive to MST™:
| Part Number | Color | Primary Use |
|---|---|---|
| 300-3910-F020 | Natural | Universal / label-based ID |
| 300-3910-FB20 | Blue | Citrate / CLSI blue-top |
| 300-3910-FE20 | Orange | STAT / priority cryo batch |
| 300-3910-FG20 | Green | Specimen-type or batch designation |
| 300-3910-FL20 | Lavender | EDTA anticoagulant / lavender-top |
| 300-3910-FM20 | Chocolate | Specialized batch — unique to MST™ |
| 300-3910-FN20 | Amber | Light attenuation — unique to MST™ |
| 300-3910-FP20 | Fuchsia | GYN / anatomic pathology batches |
| 300-3910-FR20 | Red | Serum / CLSI red-top convention |
| 300-3910-FW20 | White | High-contrast label surface |
| Yellow | SPS/ACD / CLSI yellow-top | |
| 300-3910-FZ20 | Black | Light-sensitive specimen protection |
Laboratory Applications
MST™ serves biobank programs using MST™ vials with yellow color-coded routing; automated cryo vial handling systems and high-density cryo box programs; and any MST™ vial workflow requiring cryo-rated HDPE closure at -196°C LN₂.
U.S. Manufacturing, Quality & Institutional Procurement
Every Caplugs® Evergreen lot is precision-molded at our California manufacturing facility. We supply reference laboratories, hospital systems, and federal procurement offices under institutional pricing programs. Request a free sample below to validate fit before committing to volume.
Frequently Asked Questions — Caplugs® Evergreen
What is the color convention for yellow MST™ flat-top cryo caps?
Yellow MST™ caps correspond to the CLSI H3 SPS/ACD convention — designating blood culture and ACD-preserved cryogenic specimens in MST™ vial cryo box programs. All 12 MST™ colors are priced uniformly at $19.78/200-bag.
What is the difference between MST™ caps and CryoSure® caps?
MST™ caps (300-3910) have a flat-top profile and fit MST™ cryogenic vials. CryoSure® caps (300-3900) have a dome-top profile and fit CryoSure® vials. Both are HDPE-engineered for -196°C LN₂ but are not interchangeable. MST™ also offers Chocolate and Amber colors not in the CryoSure® range.
Are MST™ caps compatible with LN₂ immersion storage?
Yes. MST™ HDPE caps are engineered for LN₂ vapor phase (-196°C) and direct LN₂ immersion. Do not use standard HDPE tube caps (300-3010, 300-3532, 300-3541) at LN₂ temperatures — use only caps specifically engineered for cryogenic service on your cryo vials.
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