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Glass, with ground stopper and tubule
These transparent polystyrene gas (specimen) jar are used to preserve different specimens in the lab are provided with a cap that fits in tight. These Jars provided excellent protection to the species preserved in it.
Borosilicate Glass, with side arms
Glass working model with visible valves, fitted on wooden stand, complete with water reservoir.
Borosilicate glass, with side arms. Limbs closed by hollow glass stoppers.
