Material: glass, rubber. Durable and will not cause allergies Quantity and size. 4 suction cups of different diameters. Method of application: 1. Apply essence to face or body, use appropriate size cupping device, lift and massage repeatedly. 2. Adjust the cupping device to a certain part of the body, press the rubber head, suck in the air, the skin will puff up, keep it for about 15 minutes Applicable to all parts of the body, it can promote blood circulation, relieve fatigue, detoxification and beauty, lift and firm, etc. Use for 10-15 minutes a day, the effect will be more obvious after one month Product These transparent suction cups provide excellent visibility and strong suction. We specifically chose the clear cups on the market as they are our favorite due to their high visibility. You can see the color of the tissue through the cup to help you determine the amount of stagnation in the tissues. Two ways to use Dynamic - Squeeze the cup, place it on the skin and release to create suction, glide cup along massage lines. Static - Squeeze cup, place on skin and release, leave on for 1-2 seconds and remove cup. Repeat while constantly moving towards the end of the massage line. Avoid leaving cups in one place as permanent bruising may occur. Package includes: 4 cups