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Set of 6, 6 chunky, durable plastic test tubes With calibration marks (25, 50, 75 and 100ml) Test Tubes 150 x 30mm (h x w), This set of 6 test tubes comes complete with an activity guide and sturdy stand. Each test tube has a different coloured screw lid to enable users to monitor different contents, side by side without the risk of mixing up the contents.
