The Ambu solid gel surface electrodes are self-adhesive and both easy to reposition and remarkably comfortable for patients. They Feature a high quality silver/silver chloride sensor for optimum signal quality. The solid gel, combined with an effective adhesive, allows technicians to locate the best recording site without leaving messy gel deposits that must be wiped off. The adhesive is specially formulated so it will not irritate sensitive or damaged skin. Key Features: Soft and Flexible material for added comfort. Duck-foot design minimizes movement articles. Available with color-coded lead wires. Soft and Tangle-Free Leadwires. 20 x 15mm. Packaging:12/Pack.