AC-BLK Color: Black Features: -Durable enough to withstand repetitive use. -Improve balance, coordination and strength of lower extremities. -Mimics the movement and shape of standard gym balls. -Useful for posture, fitness and balance training. -Dual textures on surface to enhance sense of touch and coordination. Product Type: -Balancer or stability ball. Material: -Plastic. Dimensions: Overall Height – Top to Bottom: -4″. Overall Width – Side to Side: -12″. Overall Product Weight: -2 lbs. Overall Depth – Front to Back: -12″.