Made of high-quality solid PVC, these massage balls come in a set of two: 7.5cm green and 7.5cm purple. Stress Relief: The spikes on the massage balls provide a stimulating massage, stimulate blood circulation, increase vitality, relax the body and mind, relieve stress, improve mobility, and rejuvenate all parts of the body. Easy to Use: These massage balls are ideal for relieving pain caused by muscle tension in the neck, shoulders, hands, legs, back, hips, and feet. Simply place them on the painful area and apply gentle pressure to relax muscles, relieve spasms, stimulate blood circulation, and reduce stress. Massage Ball for Plantar Fasciitis Relief: Rolling your foot over the spiked massage ball can help relieve plantar fasciitis. The small spikes strengthen and massage the muscles and fascia of the foot, promoting blood circulation, relieving pain, soothing inflammation, and increasing body awareness. Versatile: The massage balls are suitable for massaging all parts of the body. They massage and relax the muscles of the hands, legs, ankles, shoulders, hips, and feet. They can be used by athletes for post-workout recovery and relaxation. They are ideal for gymnastics, yoga, Pilates, and daily activities that promote blood circulation. Show more