Carbonflex Electrodes Silicone Insulated Diam 4 Blk Orthopedic Care 5 H (at rails) * Color:Yellow 5 H (at rails) * O2 holder standard * IV pole standard * 4 With Lock * Contoured surface provides a more comfortable and supportive seat * Comes with Lok In El© slip in bracket that provides a fast convenient and safe way to secure the seat * Weight Capacity: 300 Lbs 4 Round Black * Note: The hard rubber electrodes are now softer silicone electrodes * The new silicone electrodes are of the same high quality and have very low resistance and they are more suited to the body * Uniform conductivity conserves energy and improves performance of equipment