Flask Volumetric class 'B', cap. 500ml, socket size 19/26, borosilicate glass, Blue Printing-EIS-CH0448H offers a thoughtfully designed, durable resource for hands-on learning. Volumetric flask made of high quality, heavy duty, 3.3 Borosilicate glass. Class B tolerance. 500ml capacity. Socket size 19/26. Fitted with chemical resistance polypropylene stopper. As per DIN ISO 1042 standard. Stands 12.5" tall with a 4" width at the widest point. Volumetric flask made of high quality, heavy duty, 3.3 Borosilicate glass. Class B tolerance. 500ml capacity. ÂÂ Socket size 19/26. Fitted with chemical resistance polypropylene stopper. As per DIN ISO 1042 standard. Stands 12.5" tall with a 4" width at the widest point.