Silica Gel Breather For Transformer is a device that is typically used in transformers to control the level of moisture inside the transformer tank. It consists of a cylindrical container that contains silica gel beads. The silica gel beads absorb moisture from the air as it enters the container through a desiccant breather. Silica Gel Breather For Transformer prevents moisture from entering the transformer and helps to maintain the insulation properties of the oil and paper insulation.