Feature: 1. WIDE USAGE: Foot massage balls can be relief plantar fasciitis and used on your hands, it is also suitable for forearms, shoulders, back, feet, hamstrings etc. 2. EASY TO USE: You can lean on the foot massage myofascial balls and use your own weight and gravity to relieve muscle knots and tension. 3. RELIEVE STRESS AND PAIN: Foot myofascial balls not only help to relieve pain, but also help to relieve stress throughout the body and restore all parts of the body. 4. IMPROVEMENT AND RECOVERY: Foot massage roller myofascial balls help to improve posture, circulation and speed up muscle recovery time. 5. SAFE MATERIAL: Foot massage spiky balls are made of high quality PVC, safe, non toxic, odourless, environmentally friendly and durable for long term use. Specification: Item Type: Foot Massage Spiky Ball Material: PVC Size: Diameter: Approx. 9cm/3.5in Uses: For Massage, Muscle Relaxation, Etc.. Package List: 1 x Foot Massage Spiky Ball Note: Please allow for some errors in manual measurements.