Thank you for showing your interest in Carbon-Rubber Elect,each, Pin from T.e.n.s. Units & Supplies. The Carbon-Rubber Elect,each, Pin is a product of Staodyn Rehabilicare and is thereby made of the highest quality. If you have any questions regarding Carbon-Rubber Elect,each, Pin or any product in T.e.n.s. Units & Supplies, please contact us. Our experienced personnel will answer any questions you have about Carbon-Rubber Elect,each, Pin. Also, if you are interested in purchasing large quantities of Carbon-Rubber Elect,each, Pin or any T.e.n.s. Units & Supplies, please contact Customer Service.