The Cavity Block (S.G.) is a laboratory glass plate made from soda glass (S.G.), designed with multiple small cavities or depressions for carrying out micro-scale chemical reactions and observations. It is commonly used in laboratories for small quantity experiments, sample testing, and demonstration purposes.The block features uniformly shaped cavities that allow safe handling of small amounts of chemicals, solutions, or biological samples. Its clear glass construction provides excellent visibility, making it easy to observe color changes, reactions, or precipitation during experiments.