MCT Twin Rack

Quick Answer: The MCT Twin Rack is a double rack for microcentrifuge tubes (MCTs). Twin microtube racks of this kind are commonly two-faced, with one side sized for 1.5 ml and 2.0 ml tubes and the other for smaller 0.5 ml tubes, so one rack serves both tube sizes at the bench.

Two Racks in One

Molecular biology protocols often move between tube sizes: a DNA extraction in 1.5 ml tubes feeds a reaction set up in 0.5 ml tubes, or a stock is split into large and small aliquots. An MCT twin rack covers both without a second rack on the bench. With a two-faced design the rack is simply turned over to bring the other size uppermost, once the tubes on the working face have been taken out.

The layout of this particular twin rack, including which tube sizes each side takes and the number of positions, is not given in the title, so compare it with your tubes before ordering. Twin racks are commonly moulded in polypropylene, which accepts routine disinfection and can generally be autoclaved. The Reversible Rack in the lab glassware range follows a similar two-faced idea, and the single-sided MCT Rack is the simpler option when only one tube size is used.

For teaching labs, one twin rack per pair of students can replace two single racks, which keeps stock-taking and cupboard space simpler. The trade-off is that only one face is usable at a time, so a practical that needs both sizes at once is better served by two separate racks.

Applications

• Moving from extraction in 1.5 ml tubes to reactions in 0.5 ml tubes in the same session
• Issuing one rack per student pair in molecular biology practicals
• Holding aliquots of different sizes taken from one stock solution
• Saving bench space in small labs and field kits

Specifications

Care & Handling

• Empty the upper face before turning the rack over
• Clean both faces after use, since the lower face collects drips and dust
• Autoclave polypropylene racks lying flat, and let them cool before use
• Keep the rack off hot plates and out of drying ovens unless it is rated for the heat

Why Choose LabEquip

Teaching labs, diagnostic training centres and small research groups that work with two microtube sizes and want fewer racks to manage are the typical buyers. LabEquip supplies the twin rack in Biology Lab Products; tell us your tube sizes through our contact page.

Frequently Asked Questions

What does twin mean in the name of this rack?

It indicates a double rack. Twin microtube racks are commonly two-faced, with a different tube size on each side, so one rack does the work of two.

Which tubes fit a twin rack?

Designs of this type usually take 1.5 ml and 2.0 ml microtubes on one face and 0.5 ml tubes on the other. Test your tubes in each face before loading a full set, since tube shapes vary between makers.

Can both sides be used at the same time?

No. Tubes stand upright only in the face that is on top, so empty the working face before turning the rack over to use the other side.

Is the twin rack the same as the reversible rack?

Both use the idea of two faces on one rack. Compare the tube sizes and number of positions on each face, as these differ between designs, and choose the one that matches your tubes.

Can the rack be autoclaved?

Polypropylene racks generally tolerate autoclaving at 121 °C. Lay the rack flat, avoid stacking weight on it, and let it cool fully before loading tubes.

How is the rack cleaned between practicals?

Wipe both faces with 70% ethanol, and wash the rack in mild detergent when soiled. A soft brush clears the holes, where dried drops tend to collect.

Last Updated: September 2026