This is a set of 4 sponge electrodes (2in x 2in)
This is a set of 4 Sponge electrodes that are 4in x 4in.
This single sponge electrode is sized 3.5in x 7in.
1 Sponge electrode (8" x 10")
This is a set of 24 sponge electrode inserts (2in x 2in).
This is a set of 4in x 4in sponge inserts for sponge electrodes, ...
12 Sponge inserts for Sponge Electrodes (3.5" x 7& ...