• Of borosilicate glass

 • All sizes have a flange on which they are suspended without use of stopper

 • Size D is used in the boiling nitric acid test for corrosion resisting steels, in accordance with ASTM method A 262

 • Total height of 6 3/4 inches

Sizes B and D have pointed bottoms. Size B finger is 32 x 157 mm; flange diameter 42 mm. SizeD finger is 47.6 x 114 mm; flange diameter 63.5 mm.