25 x 150mm Borosilicate glass test tube, tube has rounded bottom, rolled-top lip and holds 57ml. Size is given with  OD (Outside Diameter) first then length. All measurements are approximate. OD measurement may vary by up to 1mm. These test tubes are capable of holding just under 2oz of liquid.Pack of 72.  Cork stopper #11, Rubber stopper #4 will fit this tube.