Cylinders comply with ASTM E-1272, Class A standards, batch certified. Double metric scale, calibrated to contain. Borosilicate glass cylinders with pour spouts feature heavy uniform wall tubing and strong, stable, hexagonal bases. All cylinders come with bumper guards. Additional Info: Graduated Cylinders, Glass, Class A, Batch Certified 500ml Package Size(L x W x H): 16 X 8 X 5 (IN) Categories: Cylinders, Glass HTS Code: 7017.90.5000 UNSPSC: 4.11218e+007 Country Of Origin: INDIA