This reusable sponge pad set includes two standard 50 mm pads. Each pad is filled with high-absorption sponge material and wrapped with soft fabric for better moisture retention and even conductivity. The silicone holder features a universal 2.0 mm pin connector, compatible with most common low-voltage devices for general-purpose applications. Designed for general conductive, research, and educational use, these pads can be moistened with tap or saline water for optimal contact. They are easy to clean, reusable, and practical for a wide range of everyday electronic or learning projects.