Description: Silicone Material: This cupping set is made of soft and elastic silicone, the cup is thickened and enlarged, with smooth edges, no burrs, and a smooth surface.Good Sealing: The silicone vacuum cupping cup mouth has a large contact area with the skin, has good air tightness and is not easy to fall off.Manual : Just press lightly to manually vacuum. It provides powerful suction making it easy to operate.Convenient Operation: Silicone cupping just need press to absorb, its that simple.Multi Functional:Silicone can puller is very suitable for home health, no need to ignite; can be operated by person. Suitable for all seasons and all ages. Specification: Material: Silicone Size Chart: Numbers 1: Outer Diameter: 3.5cm/1.38inch, Inner Diameter :2.3cm/0.91inchNumber 2: Outer Diameter:4.6cm/1.81inch, Inner Diameter: 3cm/1.18inchNumbers 3 :Outer Diameter: 5.8cm/2.28inch, Inner Diameter : 4.1cm/1.61inchNumber 4: Outer Diameter: 6.8cm/2.68inch, Inner Diameter : 4.8cm/1.89inchNumber 5: Outer Diameter: 7.5cm/2.95inch,Inner Diameter : 5.5cm/2.17inch Package Includes: 2 Pieces Numbers 1 Silicone Vacuum Cup4 Pieces Number 2 Silicone Vacuum Cup2 Pieces Numbers 3 Silicone Vacuum Cup2 Pieces Number 4 Silicone Vacuum Cup2 Pieces Number 5 Silicone Vacuum Cup Note: Please allow slightly errors due to manual measurement and different monitors.