Test Tube, cap. 50ml, 150x24mm, boro. glass-EIS-CH0722G offers a thoughtfully designed, durable resource for hands-on learning. Borosilicate glass 3.3, round or flat bottom, rim or without rim, graduated. Cap. 50ml, 150x24mm, Borosilicate glass 3.3, round or flat bottom, rim or without rim, graduated.