4/Pk Yellow Reusable Sponge Covers for Rubber Electrodes

4/Pk Yellow Reusable Sponges for Rubber Electrodes Electrode Sponge Covers.
Use the sponge with the corresponding size of rubber electrodes.The sponges will degrade over time and should be replaced on signs of wear, degradation or damage.
Sizes for Choose: 2.7" x 4" and 3" x 4.75"

Pack of 4.