Ultra Polys controlled comfort electrodes offer the best features in an electrode. The conductive grid pattern evenly disperses the current over the surface of the electrode. The patented MultiStick gel conforms easily to the skin, offering excellent contact to the patient. With superior contact gels and even current distribution, you will find this the best electrode for delivering electrotherapy. Each electrode measures 2" x 4". There are 40 electrodes per case. Four electrodes per package, 10 packs per case.