Durable, machine-blown body. Heavy beaded tubing neck. Flasks feature a sharp graduation line and large white block letters. A ground glass stopper is included. Meets Class A specifications per ASTM E-288. Individually serialized and certified. Additional Info: Volumetric Flask, Class A, With Glass Stopper, Individually Certified, 5ml Package Size(L x W x H): 4.5 X 2 X 2 (IN) Categories: Flasks, Glass HTS Code: 7017.90.5000 UNSPSC: 4.11218e+007 Country Of Origin: INDIA