Feature: 1. Multiple Applicable Parts: Suitable for massaging neck, back, thigh, legs, waist, shoulder, arms and many other parts, lower impedance, more even current distribution. 2. Fit Well: Self adhesive design, fit the skin, not easy to slip, smooth, no bubbles, good conductivity, can be used repeatedly, bring you convenience. 3. TENS Machine Accessory: Important and necessary accessory for TENS machine, pulse muscle massager, etc. Wonderful replacement for the old or broken one. 4. Improve Pain: Easy to install and use, help improve shoulder and back pain, relieve numbness in legs and feet, relieve arm stiffness, make you feel comfortable. 5. 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. Specification: Item Type: Electrode Pad Material: White Non Woven Fabric Size: Approx. 4 x 4cm / 1.6 x 1.6in Quantity: 16pcs. Package List: 16 x Electrode Pad (4 Bag) Note: Please allow slight error due to manual measurement. Thanks for your understanding.