Feature: Designed for back muscle, arm, neck and foot massage Can be used on a desk, wall or floor Helps balance training and correct wrong posture EPP material, sturdy design, durable and practical Package weight: 0.16 kg Product size (length x width x height): 6.3 x 6.3 x 6.3 cm   Package size (length x width x height): 6.3 x 6.3 x 6.3cm (opp bag) Package Contents: 1 x Peanut Yoga Massage Ball