A rack is a small purchase that affects workflow more than expected: tubes tip over, labels face the wrong way, or the rack cannot be autoclaved. Choose by tube diameter, capacity and the cleaning regime.
| Material | Best for | Watch-outs |
|---|---|---|
| PP (polypropylene) | General lab, autoclavable | May soften at very high temperature |
| Stainless steel | Heavy use, heat, solvents | Higher cost; check welds |
| Foam | Centrifuge tubes, transport | Not for high-temperature sterilisation |
| Acrylic | Display, cold room | Can crack with solvents or heat |
| Tube diameter | Typical rack | Use |
|---|---|---|
| 13 mm | 50 holes | Small culture tubes |
| 15 mm | 50 holes | 15 mL centrifuge tubes |
| 17–19 mm | 50–100 holes | Standard test tubes |
| 25–28 mm | 20–30 holes | 50 mL tubes |
| 39–41 mm | 20–50 holes | Large tubes / bottles |
Measure the tube outside diameter, not the nominal volume. A 50 mL conical tube and a 50 mL round-bottom tube can need different hole sizes.
PP and stainless steel racks are autoclavable; foam and some acrylic racks are not. Remove labels and tube residues before autoclaving, and allow the rack to cool before handling. Stainless steel can be washed and dried repeatedly; PP is lighter and less likely to scratch benches.
We supply PP, stainless steel and foam racks in common hole sizes and capacities. Tell us the tube diameter, capacity, autoclave requirement and whether stacking is needed.
Measure the tube outside diameter; most 15 mL conical tubes fit a 15 mm hole rack. Check the tube length and support depth.
Most PP racks are autoclavable. Confirm the manufacturer's temperature limit and allow the rack to cool before handling.
For heavy daily use, heat or solvent exposure, stainless steel is more durable. PP is lighter and usually sufficient for routine work.
Yes, foam racks for 15 mL and 50 mL tubes are available for transport and centrifugation workflows.
Stackable options are available. Check that the feet locate securely and that the stacked height fits your incubator or fridge.
Tell us the sizes, quantities and sterility requirements. We reply within 2 hours on business days.
info@jwresearch.cn