Type 4: Blue / 2 pieces Suction type massage balls for muscle stiffness relief, balls with suction cups for body care, washable, for shoulder blades, shoulders, neck, back, waist, calves, feet, soles, full body care, refresh, in the bathtub, bathtime, easy to use, finger pressure, acupressure, myofascial release, free shipping ‐ Mercari: Shop from Japan