■ Set of 3 manual suction devices. Inner diameter: approximately 1.8cm, Outer diameter: approximately 3cm Can be used for various purposes. For example, correcting inverted nipples, first aid for bee stings, and massage. Manual operation allows for subtle adjustments, reducing pain. It's especially effective when used in the bath. ★ Size is only XS. See the image. For acupressure points on the lower back For acupressure points on the neck For emergencies