Check the listing for details. REPLACEMENT MASSAGE PADS (4) for PALM/ECHO PULSE DIGITAL MASSAGER MACHINE TENS. Condition: New without box. Listed at 9.49 USD. REPLACEMENT ELECTRODES PADS for TENS, Digital Massager These are nice electrode pads that are durable and flexible and are excellent for applying around joints such as wrists or elbows. 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. Electrodes are Reusable Electrodes wipe clean with damp cloth. Measurements are: 3" (7.5 cm) by 1.77" (4.5 cm). Pin diameter is 3.5 mm. Included are 4 Pads (2 sets). Each Set (2 pads) is packaged in a resealable storage bag. These high quality pads are also compatible with digital massagers/leads that connect to 3.5mm snap massage pads.