Our capillary tubes are 75mm in length and have an inside diameter of approximately 1.1mm to 1.2 mm and an outside diameter of approximately 1.5mm to 1.6 mm. These tubes are open on one end and closed on the other. They are packed in vials of 100 tubes.
Our products are not toys. Use in a laboratory or educational setting only. Not for children 13 and under.