Kimble 28014F-2000 Borosilicate Glass 2L, +/- 0.50mL Tolerance, Round with Flat Bottom Class A Volumetric Flask, with Color-Coded PTFE Stopper (Pack of 1) Volumetric flask with a graduated ring blasted on the neck Calibrated to contain Designed from ASTM Specification E288, Class A un-serialized requirements Supplied with a PTFE stopper having a red handle This flask is a test tube shape, with a marking spot on 2L