0.5ml brown Plastic Test Tubes with Screw on Caps and 'O' ring seals in the capĀ - pack of 20
The addition of the 'O' ring seal ensures a liquid tight seal when the cap is screwed on.
Tubes measure approx 45mm x 10mm with opening size 8mm diameter
Self standing design, easier to fill.
Postage included to the UK mainland.