Reduction adapters are laboratory glassware accessories used to connect two pieces of glassware with different joint sizes. They consist of two parts: a larger socket that fits onto a larger joint, and a smaller cone that fits into a smaller joint. The reduction adapter allows two glassware components with different joint sizes to be connected, allowing for versatility and flexibility in laboratory setups.

The adapter is commonly used in chemical experiments, especially in the areas of distillation and reflux, where it is important to have a secure and leak-proof connection. The reduction adapter ensures a tight seal between the glassware components, minimizing the risk of leakage or contamination during the experiment.