Safe MaterialGlass, Rubber Durable and does not cause allergies. The skin in contact with the glass will not cause allergies or burden Quantity and Size4 stencils of different diameters.1#15mm2#25mm3#35mm4#55mm. Various sizes, suitable for neck or face massage, lifting and firming Application Method1. Apply the essence to the face/body, use an appropriate size, lift it repeatedly and massage it. 2. Attach the brush to a specific part of the body, press the rubber head, suck in the air, the skin will dent, and hold it for about 15 minutes Full Body UseIt can be used on all parts of the body and can promote blood circulation, relieve fatigue, detox and beauty, lift and tighten, etc. Long-Lasting ResultsWith even application for 10-15 minutes , the effect is more noticeable after a month