Features： 1、Suitable for knee bending part, neck, back and other parts, widely applications and wonderful accessory for electronic physiotherapy machine. 2、Suitable for all kinds of medium frequency electronic physiotherapy machines. Help improve blood circulation, promote metabolism, eliminate fatigue. 3、Made of high quality silicone material, soft and comfortable to use, not easy to break and damage, having long service time. 4、 electrical conductivity, specially designed for therapeutic equipment, easy and convenient installation. 5、Reusable design and durable to use, 20.5 x 14cm / 8.1 x 5.5in of the size, exquisite workmanship and good using effect. Specification： Item Type: Electrode Pad Material: Silicone Needle Hole Diameter: Approx. 2mm / 0.08in Description: Suitable for all kinds of medium frequency electronic physiotherapy machines.Help improve blood circulation, promote metabolism, eliminate fatigue Size: Approx. 20.5 x 14cm / 8.1 x 5.5in Package List： 2 x Electrode Pad