Material: durable non-toxic medical-grade plastic.Cupping is a traditional Chinese medical veins and arteries therapy to cure various diseases， improves the muscle immunity and function.Pure physical therapy which is safe and quick， easy to operate by yourself at home.Different sizes cups for your different needs.Cure inside diseases by outside treatment with very goods curative effect. Biomagnetic Vaccum idea， fashion technology， ideal to get you back good health.Material: PS plasticExtension tube: about 47cmABS gun Size: 18 * 6cm; Diameter: 3.5cmNo.1 Cup Size: inner diameter 56mm， outer diameter 70mm， height 75mmNo.2 Cup Size: inner diameter 48mm， outer diameter 62mm， height 72mmNo.3 Cup Size: inner diameter 41mm， outer diameter 52mm， height 65mmNo.4 Cup Size: inner diameter 33mm， outer diameter 44mm， height 64mmNo.5 Cup Size: inner diameter 25mm， outer diameter 34mm， height 60mmNo.6 Cup Size: inner diameter 22mm， outer diameter 31mm， height 60mm