Drummond Scientific Company Microcap Glass Capillary Tubes Micro Series

These are highly precise glass capillary tubes made of borosilicate glass, and because the volume is constant from end to end of the capillary tube, they are suitable for spotting samples in TLC and paper chromatography, and for applying samples in electrophoresis. Instructions for use: ▼1 Insert the microcap fully into the cap until it is visible inside the glass tube. ▼2 The rubber bulb at the top has a hole, allowing air to pass through freely, so the liquid rises due to capillary action. ▼3 When the liquid is completely filled from end to end of the capillary tube, the specified volume has been collected in the microcap. ▼4 To dispense the liquid, cover the hole in the rubber bulb with your finger and press the rubber bulb. ▼*One rubber bulb is included with 100 microcaps.