Centrifuge tubes are among the most used consumables in any lab. The two common formats — 15 mL and 50 mL conical — look similar but differ in rotor fit, maximum RCF and cap design. Get these right before comparing price per case.
| Format | Typical working volume | Common use |
|---|---|---|
| 15 mL conical | 10–12 mL | Cell pelleting, media, sample prep |
| 50 mL conical | 40–45 mL | Larger samples, buffers, centrifugation |
Do not fill to the nominal volume for centrifugation; leave headspace so the tube does not deform or leak.
Check the tube's rated maximum relative centrifugal force (RCF) against your rotor. Many standard 15/50 mL tubes are rated at 12,000 × g; higher-speed versions are available at 15,000 × g. Also confirm the tube diameter and length fit the rotor buckets or adapters.
Sterile, DNase/RNase-free and endotoxin-free options are available for cell culture and molecular work. If your SOP requires lot documentation, ask for the certificate before the order is placed. Not every SKU carries every claim.
Screw caps with a molded seal reduce leakage during centrifugation. Aerosol-tight caps are available for hazardous samples. Check that the cap is compatible with the tube and that the threads are clean; a cross-threaded cap will leak.
We supply 15 mL and 50 mL conical tubes, sterile and non-sterile, racked and bagged, with 12,000–15,000 × g options. Tell us the rotor model, maximum RCF and sterility requirement; we will confirm the tube and packaging.
Many standard 15 mL tubes are rated at 12,000 × g, but always check the tube specification and rotor limits. Higher-speed versions are available.
No. Leave headspace as recommended by the tube manufacturer so the tube does not deform or leak.
DNase/RNase-free options are available. Confirm the exact SKU and lot documentation for your assay.
Racked tubes are convenient and ready to use; bagged tubes are more economical for high-volume work and require a separate rack.
Aerosol-tight cap options are available for hazardous samples. Confirm the tube format and rotor compatibility.
Tell us the sizes, quantities and sterility requirements. We reply within 2 hours on business days.
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