A burette clamp double is a laboratory apparatus that is used to securely hold and support two burettes simultaneously during an experiment. A burette is a long, narrow glass tube with a graduated scale that is used to dispense a precise volume of liquid.

The burette clamp double consists of two jaws with screw mechanisms that can be adjusted to fit the size of the burettes. The clamp is typically attached to a laboratory stand or support rod using a separate holder or adapter. The burettes can then be inserted into the clamp and held securely in place during the experiment.

This allows for precise control of the flow of liquids from the burettes, ensuring accurate measurements. The burette clamp double is commonly used in chemistry experiments, particularly in titration procedures that require two different solutions to be dispensed simultaneously.