The Thorn Fit Hybrid Lady Roller massage roller Thorn Fit will work during massage of different parts of the body. The set contains two rollers ;various rollers. Model with larger diameter and medium density will work best for people starting their adventure with rolling. Roller with smaller diameter can be used as a stiffening insert and connector to the roller. The structure is made of environmentally friendly and fully recyclable EPP foam extremely light and durable thanks to excellent impact absorbing properties. 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