DURAN Media Bottles With Cap & Pouring Ring, Graduated. Media bottles compliant with ISO 4796-1:2000; made from DURAN borosilicate glass 3.3 to ISO 3585:1998; class 1 glass to the requirements of USP, EP & JP. Utilises the popular GL cap sizes; compatible with DURAN GL cap systems. Tightly controlled glass quality, wall thickness and geometry ensure high resistance to thermal shock giving long service; very resistant to chemical attack. Supplied with polypropylene cap and pouring ring giving service / autoclaving temperature to 140°C (higher with alternative caps BOT5240 - 44 & BOT5102) and usable down to -40°C provided the bottle is tilted at 45° and not more than full. Retrace Code on each bottle allows downloading of individual batch certificate from www.DURAN-Group.com.