specification: Item Type: Negative Pressure Adsorbed Electrode_x000D_Material: Silicone, stainless steel_x000D_Applicable Parts: Suitable for small joint parts_x000D_Inner Diameter: Approx. 50mm / 1.97in_x000D_Applicable Machine: Electrotherapy instrument_x000D_Applicable Scenarios: Fitness equipment, health massage, Musical Instruments, sports, extreme challenges._x000D_Scope of Application: Suitable for auxiliary treatment of knee osteoarthritis, cervical spondylosis, lumbar disc herniation, lumbar muscle strain, sciatica, periarthritis of shoulder, soft tissue contusion and so on. Features: 1High Quality Silicone: Made of high quality Silicone, it is safe to use and durable. 2Strong Adsorption: Strong adsorption performance, not easy to fall off, you can use it with confidence. 3Precise Treatment: Small electrode bowl, treatment is more precise and more practical. 4Applicable Scenarios: Fitness equipment, health massage, music instruments, sports trends, extreme challenges. 5Wide Range of Uses: Suitable for auxiliary treatment of knee osteoarthritis, cervical spondylosis, lumbar disc herniation, lumbar muscle strain, sciatica, soft tissue sprains, etc. PackageList: 1 x_x000D__x000D_Adsorbed Electrode