Description: Electric Massage Machine:Creative 4 ball silicone massage head can relax the full body muscle, neck, back, shoulder, arm, etc. An ideal gift for your family and friends.Sturdy: Massage replacement head is made of premium Silicone material,sturdy and wear resistance.Easy to Use: Experience comfort with this massager interfaces that can be used while lying down or sitting up. It's fit for those who prefer to relax without having to hold the device.Versatile: The silicone head suitable for all body parts, this massager relieves muscle soreness and fatigue.Size: With a bracket width of 8cm and interface sizes ranging from 12-19mm. The package includes 1 massage replacement head bracket and 3 interfaces. Specification: Material:Silicone Size Chart: width 8cm/3.15inch Package Includes: 1 Massage Replacement Head3 Interfaces Note: Please allow slightly errors 1-2cm differences due to manual measurement.