Flasks, Volumetric, Class A, Pyrex® Stopper, Pyrex®

  The strength of these flasks has been increased appreciably through machine-blown bodies to which are sealed heavy-tubing necks tooled for glass stoppers. The graduation line is sharp and permanent and large white block letters make the inscription easy to read. The 1mL and 2mL sizes are test tube shaped. Sizes 3L thru 6L have pennyhead stoppers.