Model 1197 series -Gas Collection (Meteorological) Balloons

Made of Neoprene for short-term gas collection. Diffusion is relatively low and gas may be stored up to one-half hour witout measureable changes in gas composition. The dead space is zero if they are wrung out. During test, dead space is limited to that of the attached valve. Part # 1197-25 neck fits tight over 22mm OD fitting.