Technical information Dimensions : 30x13.5x13.5 cm Weight : 0.1kgColour : BlackMaterial : Polypropylene The BLACKROLL® TWIN combines our classic BLACKROLL® STANDARD roller with the double fascia ball DUOBALL 12. Due to the recess in the centre, the TWIN is particularly suitable for use on the back, as the spine is not affected during use. Compared to our DUOBALL, however, the contact surface is wider on the left and right. The fascia massage on the left and right of the spine is therefore more comprehensive and less selective. In addition, the twisting of the material in the centre bar of the TWIN stimulates the skin and tissue, especially when used on the legs and arms. Targeted self-massage with stimulation of the skin.For treating the spine, calves and parallel muscles.Stimulates and increases blood flow to the tissue by twisting in the centre.Medium hardness.Recyclable, durable material with a high-quality surface.