Flasks, Wide Mouth, Volumetric, with Interchangeable Glass & PP Stopper, Accuracy as per Class ‘A’, with Certificate, Compliance with ISO/DIN 1042. •Manufactured from 3.3 Borosilicate, USP type I Glass for corrosion-free performance • Each Flask engraved with Individual Serial Number. •Specially designed wide mouth for testing bigger dia tablet without making it in powder form.