3 – 4″x6″ Extra Large Superior Reusable White Foam Electrodes For electrical stimulation New Comfortable butterfly shape white foam backing with black carbon conductor and covidien gel adhesive 3 packs of 1 electrode each – ProM-036 Compatible with most electronic massagers and electrical stimulators Return shipping policy, we can only offer free return shipping if the item is a defect or damaged in transit. We can not accept free return shipping if the item was a wrong size or tried on If you have any questions please feel free to ask