Specifications:Material: PVC+GlassColor: Blue/Pink(As Picture Shown)Quantity: 4Pcs/SetSize: 1, 2, 3, 4Height(With Ball): 96mmCup Bottom Outer Diameter: 15mm(1), 25mm(2), 36mm(3), 52mm(4)Cup Bottom Inner Diameter: 9mm(1), 14mm(2), 22mm(3), 36mm(4)Note:Please allow 1-3cm error due to manual measurement and make sure you do not mind before purchase.The color of the actual item may slightly vary from the images due to different computer screens and display settings.Thanks for your understandingPackage Included:4* Glass Vacuum Cupping CupsAdopt cupping therapy to promote blood circulation and expel the cold and dampness for daily health care.Flexible thickened PVC cups can be effortlessly squeezed to achieve better vacuum effect instantly, durable for long time use.High quality glass enables smooth edge and delicate workmanship for improved cupping comfort without hurting your skin.Detachable and removable design makes cleaning a breeze for enhanced hygiene, also save your space for storage convenience.Totally 4 size variations to treat different body parts with secure placement, flexible to use according to your demands.