Ultrathin Flexible Black Foam Backed Electrodes - 2"x4" by ProMed - ProM-039

2"x4" Ultrathin Flexible Black Foam Backed Electrodes - 4 Per Pack Specially designed Thin Black Backing with Carbon Conductor for better stimulation US Made Gel Adhesive for increased adhesion reusability The thin black backing creates increased flexibility and allows for adhesion even with uneven skin areas. Preferred by many physical therapists