Professional design ensures maximum stimulation comfort and provides optimum conductivity. Lower impedance, more uniform current distribution. These pads work with most machines that accept standard connectors and are made of conductive rubber. Designed for high conductivity. Features - Color: White.- Material: hydrogel, non-woven fabric, silica gel.- Size: 5.00X5.00X0.20cm/1.97X1.97X0.08inch.- Reusable electrode pads made of breathable fabric, and flexible for joints, stay attached well.- Fit all industry standard 3.5mm snap connectors, perfect for working with TENS unit machines, easy to apply and peel off.- Comfort cloth backing, latex-free, tens pads design for all skin type users, which is safe to use.- Flexible and close to the contours of the body, experience a gentle and smooth body massage.- Clean skin thoroughly prior to each application of the electrode pads. Electrodes do not stick well if any lotion, oil, make up, etc. is left on your skin.Packing list: 20 x Snap Style Tends Unit Pad