Amrex 2"x2" Sponge Insert Replacements From Caputron (10 Inserts/Pack)

These sponges come dry. As soon as one applies saline solution to them, they immediately absorb the solution and expand. They work best when inserted into the rubber electrode pad first as they expand quickly when wet. They provide excellent contact with and conductivity to the application area. Pack comes with 10 sponge inserts.