The Blue Jay Elite Healthcare Brand Of Peel 'n' Stik Deluxe Multi-use Reusable 2  X 2  Square Pack/4 Electrodes Are Of The Highest Quality  Affordable  Non-sterile  Reusable And Self-adhering * Coated With Long-lasting And Reliable Gel  These Powerful Electrodes Are Excellent Conductors Of Electric Current * Our Electrodes Are The Perfect Replacement Electrodes And Can Be Used With Most Tens  Muscle Stims  Ifc And Other Pain Relieving Devices * They Are Fda Approved  Can Be Applied To All Contours Of The Human Body And Can Be Reused Between 8-10 Times * Each Pack Of Electrodes Comes With A Maintenance And Instruction Sheet * Latex-free *