Regular size set has eight silicone pods (4 large, 4 small). The X-Large size set has (3) large and (3) X-Large sizes which allow for treating different target areas and larger body parts. RockPods allow professional to grab, pull and push fascia to treat pain, mobility and movement dysfunctions. Their built-in handles create two levels of suction, with no flame or separate vacuum device required. RockPods are made from medical-grade silicone, which makes them very easy to keep clean, and packaged in a convenient carrying case, which makes them very easy to store and transport. A detailed quick-start guide is included. These tools are intended for professional use only.