10–200 µL Visu-Chek™ Two-Step Tiered Pipet Tips — Multi-Fitting, Natural PP, 1,000/Bag (230-1681-03K)
The Caplugs® Evergreen Visu-Chek™ 10–200 µL pipet tips are precision-molded from virgin polypropylene in a two-step tiered, multi-fitting design that seals positively across a wide range of pipettor brands without the cost premium of single-brand OEM sourcing. Natural (clear) construction provides full sample visibility during aspiration and dispensing, and a graduated Visu-Chek™ scale along the tip wall gives technicians immediate visual volume confirmation — reducing pipetting errors in serial dilutions, PCR master mix preparation, and plate-loading workflows. Supplied non-sterile in a 1,000/Bag pack, these tips are lot-certified RNase-free, DNase-free, and pyrogen-free for demanding nucleic acid, immunoassay, and clinical diagnostic applications.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 230-1681-03K |
| Sub-brand | Visu-Chek™ |
| Volume Range | 10–200 µL |
| Tip Style | Two-Step Tiered, Multi-fitting |
| Material | Polypropylene (PP), virgin resin |
| Color | Natural (clear) |
| Sterility | Non-Sterile |
| Pack Size | 1,000/Bag |
| Certifications | RNase-free, DNase-free, pyrogen-free (lot-tested) |
| BPA / Phthalates | BPA-free; no phthalate plasticizers |
| Country of Origin | USA (California) |
Applications
- PCR master mix preparation and template addition across the full 10–200 µL working range
- ELISA reagent and sample dispensing requiring accurate, repeatable volume delivery
- Serial dilutions in clinical chemistry, immunology, and QC workflows
- Nucleic acid extraction and quantification where RNase/DNase-free purity is mandatory
- General liquid handling and sample transfer in research, clinical, and quality-control labs
Compatibility
The two-step tiered, multi-fitting shaft geometry of these tips is validated for a broad range of pipettor brands in the 10–200 µL class. Confirmed compatible instruments include the Eppendorf® Research and Reference Plus series, Gilson Pipetman® P200, Thermo Fisher Finnpipette® F1/F2, VWR® Signature™, Labnet® MultiPette, Oxford® BenchMate, and Socorex Acura® pipettors. This versatility makes part number 230-1681-03K an effective single-SKU solution for mixed-brand pipettor environments. As pipettor shaft tolerances can vary by production batch, it is good practice to perform a 5-tip aspiration validation test before committing to a large-volume purchase. For labs using color-coded tip management, a yellow equivalent (10–200 µL) is also available from the Visu-Chek™ line.
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers and saline | Excellent |
| Dilute acids and bases | Excellent |
| Ethanol (<70%) | Good — short-term contact |
| Isopropanol (<50%) | Good — short-term contact |
| Acetone / chloroform / aromatic solvents | Not recommended |
| Autoclave sterilization | Compatible (PP is autoclavable; tips are supplied non-sterile) |
Quality & Procurement
Made in USA (California), these Caplugs® Evergreen Visu-Chek™ tips are manufactured from virgin, BPA-free, phthalate-free polypropylene under ISO 9001 quality management, with every production lot tested and certified RNase-free, DNase-free, and pyrogen-free. LabSupplies.com is an authorized Caplugs® Evergreen dealer, shipping from USA inventory with same-business-day fulfillment available on stocking items. Volume pricing and institutional blanket-order programs are available for high-throughput labs and grant-funded procurement.
Frequently Asked Questions
Are these tips certified RNase-free and DNase-free?
Yes — every production lot is tested and certified RNase-free, DNase-free, and pyrogen-free, making them appropriate for nucleic acid work, PCR setup, and clinical diagnostic liquid handling where sample integrity is critical.
Will these tips fit my Eppendorf or Gilson pipettor?
The two-step tiered, multi-fitting geometry is validated for Eppendorf® Research and Reference Plus pipettors as well as the Gilson Pipetman® P200, among other major brands. Because shaft tolerances can vary, Caplugs® Evergreen recommends a 5-tip aspiration test before switching from your current OEM supply in high-volume workflows.
Why choose natural (clear) tips over colored tips?
Natural polypropylene lets you see the entire sample column during aspiration and dispensing — immediately confirming the absence of air gaps and complete liquid delivery without having to infer volume from tip position alone. The Visu-Chek™ graduated scale on the tip wall adds an additional visual reference for volume confirmation.
Can these tips be autoclaved for sterile technique?
Polypropylene is autoclavable; however, these tips are sold non-sterile and are not validated for sterile filtration or aseptic cell-culture transfer as supplied. Labs requiring a sterile tip should look for a pre-sterilized format or autoclave the bulk tips in-house following your institutional SOP.