Features: 1. Suitable for most massage guns. 2. Our massage heads are using scientific vibration frequency and amplitude. 3. The massage head can activate the muscles, increase blood flow, greatly reduce muscle recovery time, relieve pain and easily replace. 4. Suitable for sports fitness personnel, athletes,weightlifters, enthusiasts, runners, etc. 5. Small and portable, suitable for home treatment. Specification: 100% brand new quality Item Name:Replacement Heads Material:ABS Color:As the picture show Size:As the picture show(1inch = 2.54cm) Package includes: 4pcs Replacement Heads Note: 1.Due to the different monitor and light effect, the actual color of the item might be slightly different from the color which is showed on the pictures. 2.Please forgive 1 cm/0.39"-3 cm/1.18" measuring deviation due to manual measurement.