These pipettes are made from borosilicate glass in compliance with ASTM specification E-969. Color-coded. Individually serialized and certified. Calibrated to deliver. Printed with durable amber markings. Additional Info: Pipettes, Volumetric, Class A, Individually Certified, 20ml, Pack Of 5 Package Size(L x W x H): 23 X 6.3 X 1.5 (IN) Categories: Pipettes, Glass HTS Code: 7017.90.5000 UNSPSC: 4.11215e+007 Country Of Origin: INDIA