2ml Plastic Test Tubes with Screw on Caps and 'O' ring seals in the cap - pack of 20

The addition of the 'O' ring seal ensures a liquid tight seal when the cap is screwed on.

The 2p coin in the photo gives an idea of size, and the tubes measure approx 45mm x 10mm with the cap on.

Self standing design, easier to fill, marked with graduations up to 1.5ml

Postage included to the UK mainland.

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