Specification: Item Type: Electrode Pad Material: Non Woven Fabric Diameter: Approx. 3cm / 1.2in Quantity: 16pcs Package List: 16 x Electrode Pad (8 Bag) Note: Please allow slight error due to manual measurement. Thanks for your understanding.Fit Well: Electrode Pad with self adhesive design, fit the skin, not easy to slip, smooth, no bubbles, good conductivity, can be used repeatedly, bring you convenience. Portable Design: 16pcs of electrode patch are available, enough to meet your replacement needs. Small and lightweight, easy to carry, suitable for home and travel use. Multiple Applicable Parts: Self Adhesive Electrode Patch is suitable for massaging neck, back, thigh, legs, waist, shoulder, arms and many other parts, lower impedance, more even current distribution. Improve Pain: Round Electrode Pad is easy to install and use, help improve shoulder and back pain, relieve numbness in legs and feet, relieve arm stiffness, make you feel comfortable. TENS Machine Accessory: Electrode Patch is a important and necessary accessory for TENS machine, pulse muscle massager, etc. Wonderful replacement for the old or broken one.