Features: Soft and hard moderate, full elastics effect is better, just the right strength, massage in place does not hurt the texture. Simply lean on the massage ball and use your own body weight to relieve muscle knots and tension. Perfect for use while sitting on any chair, laying bed, on floor, or on a yoga mat. Use it home, at office, or at the gym. Small, portable and easy to bring along on any trip. The massage ball provide a simple and comfortable massage method that can done home or work. Specifications: Component: TPE Type: Pink Single Ball/Pink Double Ball/Light Blue Single Ball/Light Blue Double Ball/Light 01 color Single Ball/Light 01 color Double Ball/Blue Double Ball/01 color Single Ball/01 color Double Ball/Black Double Ball/02 color Single Ball/02 color Double Ball/Green Single Ball/Green Double Ball single ball diameter: about 6cm/2.36inch double ball length: about 12.1cm/4.76inch Package Includes: 1pc Fascia Ball note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.