STAINLESS STEEL TEST TUBE RACK – 12 HOLES FOR 18 MM TUBES
The Apex Labs Stainless Steel Test Tube Rack (12 Holes for 18 mm Tubes) is a heavy-duty, corrosion-resistant laboratory holder engineered for high-temperature sterilization, microbiological culture handling, and demanding analytical chemistry workflows. Precision-crafted from premium-grade, non-magnetic stainless steel, this 12-well rack offers maximum structural stability, smooth burr-free laser-cut openings, and complete chemical resistance. Specially designed to hold standard $18\text{ mm}$ outer diameter (OD) glass and plastic tubes—including $18\times150\text{ mm}$ culture tubes, boiling tubes, and large centrifuge tubes—it withstands repeated steam autoclaving ($121^\circ\text{C}$ at 15 psi) and dry-heat sterilization without rusting, warping, or degrading.
B2B Bulk Procurement & GeM Portals: Apex Labs supplies heavy-duty stainless steel laboratory hardware backed by fully compliant commercial GST invoices to streamline corporate Input Tax Credit (ITC) tracking. For central universities, IITs, state diagnostic centers, and public sector laboratories, we provide seamless tender execution and direct contracting via our active vendor profile on the Government e-Marketplace (GeM) portal.
Product Specification & Direct Ordering
18 mm Hole Diameter × 12 Holes (Well Capacity): Precision grid designed for $15\text{ mm}$ to $18\text{ mm}$ OD test tubes, boiling tubes, culture tubes, and specialized sample containers.
Technical Specifications
| Specification Parameter | Technical Detail |
|---|---|
| Material Composition | Premium Non-Magnetic Stainless Steel (SS) |
| Hole Diameter | 18 mm (Sized for tubes up to 18 mm Outer Diameter) |
| Tube Capacity / Wells | 12 Holes |
| Compatible Tube Types | $18\times150\text{ mm}$ culture tubes, boiling tubes, $15\text{ mL}$ conical tubes, $16\text{ mm}/18\text{ mm}$ glass test tubes |
| Sterilization Compatibility | Steam Autoclave ($121^\circ\text{C}$ at 15 psi), Dry-Heat ($>180^\circ\text{C}$), Chemical Disinfectants |
| Base Design | Submersible, non-tip weighted base suitable for water baths |
Custom Grid Layouts & Bulk Fabrication
Do your research procedures require alternative hole counts (e.g., 24-hole, 36-hole, or 48-hole matrices for 18 mm tubes), specialized water bath frame heights, or custom stainless steel grade requests? Apex Labs operates dedicated stainless steel fabrication facilities for large institutional contracts and OEM manufacturing. Contact us to submit custom drawings or tenders.
Technical Material & Construction Highlights
- High Chemical Resistance: Premium stainless steel structure resists degradation from organic solvents, strong acids, saline solutions, and routine lab disinfectants.
- 100% Autoclavable Construction: Built to withstand repeated high-pressure steam autoclaving ($121^\circ\text{C}$) and hot-air sterilization without structural distortion, cracking, or surface rust.
- Submersible Heavy Bottom Design: Solid, weighted base prevents floating or tipping during water bath incubation, maintaining tube alignment and safety.
- Smooth Laser-Finished Edges: Precision burr-free grid openings protect test tube walls from scratching, safeguard printed graduations, and protect user gloves.
Primary Sector Applications
- Microbiology & Life Sciences: Sterilizing, organizing, and incubating broth culture tubes, agar slants, and culture media.
- Clinical Pathology & Diagnostics: Holding large blood collection tubes, serum processing vials, and reagent preparation runs.
- Academic Institutions & IITs: Rugged, long-lasting hardware built to withstand heavy daily student usage in teaching laboratories.
- Water Bath & Thermal Workflows: Submerged heating, sample incubation, and temperature-controlled analytical tests.




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