The Thorn Fit Hybrid Roller massage roller Thorn Fit will work during massage of different parts of the body. The set contains two different rollers. Model with larger diameter and medium density will work best for people starting their adventure with rolling. Roller with smaller diameter maybe be used as a stiffening insert and connector to the roller The structure made of environmentally friendly and fully recyclable EPP foam is extremely light and durable thanks to excellent impact absorbing properties. The material is odorless, safe and easy to keep clean. Technical data:· Material: EPP· Length: 32.5 cm roller outer diameter: 14 cm cylinder outer diameter: 6 cm