Description: All metal vaccuum massage head roller for body massage,Need to use with Vacuum negative pressure . It is more effective than traditional pure vacuum method,which helps to enhancing the effect of unblocking points and channels, stimulate cells and promote blood and lymphatic circulation. This system is equipped with a special aluminium connector for the plug to prevent the tubes from cutting, also to easily and tightly insert the tubes. The back and speed up fat burning, and transfer fat into fatty acids and then discharge out through lymphatic system. It can decompose subcutaneous fat, consume accumulative fat, thus to achieve effect of and slimming. At the same time, it strengthen capacity of skin and elastic fiber regeneration, healthier, more luster and flexible. Specification: Material: Aluminum Size Chart: L: Length 114mm/4.49inch, handle width 21mm/0.83inch, head width 73mm/2.87inch M: Length 112mm/4.41inch, handle width 21mm/0.83inch, head width 54mm/2.13inch S: Length 78mm/3.07inch, handle width 18mm/0.71inch, head width 34mm/1.34inch Package Includes: 1 Piece Metal Vacuum Roller Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!