Class B, plain with beaded top, calibrated to contain. With marking spot. For use in schools and laboratories where precision is not required. Meets Federal Specification NNN-F-289, type 1, Class B.

Calibrated to contain. With marking spot and ST Stopper. Amber stain process provides protection to light sensitive liquids. Meets requirements for type 1, Class A, Federal Specification NNN-F-289, and also ASTM Specification E 288.

Plain, with beaded top, calibrated to contain, with marking spot. The DEEP Amber stripe pro vides contrasting background for improved legibility. Has fine etched line at capacity point. Meets requirements for type 1, Class A, Federal specification NNN-F-289, and also ASTM specification E 288.

Class B, calibrated to contain. With marking spot and ST stopper. For use in schools and laboratories where precision is not required. Meets Federal Specification NNN-F-289, type 1, Class B.

Plain, with beaded top, calibrated to contain, flasks, that meet the requirements for type 1 Specification E 288. with marking spot. These are precision grade "unserialized" , Class A, Federal Specification NNN-F-289, and also ASTM

Calibrated to contain. With marking spot and ST stopper. Precision grade "unserialized" flasks, that meet the requirements for type 1, Class A, Federal Specification NNN-F-289, and also ASTM Specification E 288. The 1 and 2 ml, size are test tube shaped, and are not guaranteed to the usual Class A accuracy. Available complete or flask only.