Which of the following is Vernier Calliper?

This is the source of heat when heating chemicals in test tubes

Identify this laboratory apparatus that measures mass

It olds the beaker or other glasswares when heating.

This measure the amount of liquid.

This holds test tubes when heating

This prevents the flame to have direct contact with the glassware. It also distribute the heat evenly.

What's this?

It is used to separate solid materials from liquid.