High Quality Silicone: Made of high quality silicone, it is safe to use and durable. Strong Adsorption: Offers strong adsorption performance, stays securely in place during use. Precise Treatment: Features a small electrode bowl for more precise and practical treatment. Applicable Scenarios: Suitable for use with fitness equipment, health massage devices, musical instruments, sports gear, and in extreme challenge activities. Wide Range of Uses: Designed for auxiliary use in the treatment of knee osteoarthritis, cervical spondylosis, lumbar disc herniation, lumbar muscle strain, sciatica, shoulder periarthritis, soft tissue contusions, and sprains. Specifications: Item Type: Negative Pressure Adsorbed Electrode Material: Silicone, Stainless Steel Applicable Parts: Suitable for small joint areas Inner Diameter: Approx. 50mm / 1.97in Compatible Device: Electrotherapy instrument Application Areas: Knee, neck, lower back, shoulders, and other soft tissue regions Package List: 1 x Adsorbed Electrode