Soda-lime glass.

• Solid, obliquely cut standard-ground glass stopper can be secured with a fastening clip
• Each bottle is calibrated with its own stopper; hence, stoppers and bottles are not interchangeable
• Each bottle and its stopper is marked with a unique matching identification number

For the determination of oxygen dissolved water. The measured volume is indicated to ± 0,01 ml. White labelling area.