Blue spirit filled, total immersion

Specification:

Blue spirit filled, total immersion - •Mercury free - filled with a low toxicity blue spirit •Calibrated for total immersion •Permanent amber stain graduations •White coloured background provides clear observation of blue coloured liquid column •Reinforced bulb for stirring •With plastic non-roll top and safety suspension ring •Nominal length 305mm with item 30/210/10 length 405mm