Check the listing for details. +BONUS+ REPLACEMENT ELECTRODES PADS(10)FOR DIGITAL MASSAGER, IREST SMART RELIEF. Condition: New. Listed at 14.95 USD. 10 pc Massage Pads (Large) for TENS Machine, Digital Massager ---Electrodes are Reusable ---They wipe clean with a damp cloth. ---Measurements are: 5 cm by 5 cm or about 2" by 2".Snap Connect diameter is 3.5mm ---Includes 10 Pads (5 sets). Each set (2 pads) is packaged in a resealable storage bag. These pads can be used for areas of the body that are flat, like back or thighs. They are great quality and come with a thick layer of non-irritating conductive gel that adheres well to your skin, but leaves no sticky residue when the electrodes are removed. **AND, AS AN ADDED BONUS*** => A SET OF 2 SMALL OVAL ELECTRODES WILL BE INCLUDED WITH YOUR ORDER Note: These high-quality pads are compatible with the following machines in addition to others that use pads with the 3.