Maintainance-Keep it clean, avoid to be scratched. Use the disinfectant or wet cotton cloth to clean, it can not be boiled or heated in water. Material: Silicone Inner diameter: 4.2cm External diameter: 6.5cm Height: 4.6cm Packed weight: 380g Quantity: 8 Pieces. This high quality silicone cupping set is made from quality silicone. The silicone is soft and elastic which is easy to squeeze. Just squeeze the cups to an oval shape, apply to the body, and squeeze back to a circle shape for suction. Transparent cups also let you view the treatment area and reddening of the skin. Silicone cups require no hand pumps, fire, and are safe. The soft material is comfortable on the skin for use in retaining cupping and massage moving cupping. The cup massage procedure is a simple treatment that gives impressive results. A cup massage helps release the rigid soft tissue through negative pressure and suction, it also helps drain off excess toxins and fluids your body may be retaining, it can help to loosen adhesion's and lift the connective tissues.This helps increase the blood flow to the skin and muscles that may have problems with partial atrophy. Vacuum massage is an effective means of salutary influence on the blood circulation and lymphokinesia. The massage improves the blood circulation, lymph and lymph interstitial liquid; causes local and reflex expansion of blood and lymphatic vessels. Vacuum massage renders resolving and soothing action, helps to eliminate the phenomena of stagnation, intensify metabolic processes and skin breath. The skin becomes elastic,its resistibility to the thermal and physical influences raises, contractive activity of muscles improves, their tone.