Material: glass, rubber. Durable and non-allergenicquantity and size. 4 suction cups of different diameters.How to use: 1. Apply the essence to the face/body, use a cupping device of appropriate size, and massage repeatedly. 2. Adjust the cupping device to a certain part of the body, press the rubber head, inhale air, the skin will bulge up, and keep it forabout 15 minutesApplicable to all parts of the body, it has the functions of promoting blood circulation, eliminating fatigue, detoxifying and beautifying, lifting and firming, etc.Use it for 10-15 minutes a day, and the effect will be more obvious after one monthProduct These clear suction cups provide excellent visibility and powerful suction. We specifically chose the clear cups on the market because they are our favorite for their high visibility. You can see the color of the tissue through the cup to help you determinethe amount of stagnation in the tissue.two ways to useDynamic - Squeeze the cup, place it on the skin and release to create suction, slide the cup along the massage lines. Static - Squeeze cup, place on skin and release, hold for 1-2 seconds, then remove cup. Repeat while continuing to move toward the endof the massage line.Avoid leaving the cup in one place, as this may cause permanent bruising.Shipment Quantity: 4 piecesPackage Contents: Only the above package content, other products are not included.Size: as shown(Reminder: The size is measured by hand, please allow 1-2cm measurement error)color: blue(Due to different monitors and lighting effects, the actual color of the product may be slightly different from the picture color.)