These pipettes are made from borosilicate glass in compliance with ASTM specification E-969 for class B pipettes. Color-coded. Calibrated to deliver. Printed with durable amber markings. Additional Info: Pipettes, Volumetric, Class B, 20ml, Pack Of 6 Package Size(L x W x H): 21.3 X 7.5 X 1.6 (IN) Categories: Pipettes, Glass HTS Code: 7017.90.5000 UNSPSC: 4.11215e+007 Country Of Origin: INDIA