These 7-315 series are crucibles with lids that are used with chemical compounds that may be heated in high temperatures.
This is pH Test Paper Neutral Litmus, 100 strips per vial. Used to test for acid or alkili.
These Bomex volumetric flasks are fitted with a ground stopper and are accurately calibrated for reliable measuring of liquids and solutions. The neck has a single ring graduation mark. Noted on the flask is the flask's capacity. The glass is clear.