This is a neck massager, which is made of premium PP material, durable and practical to use. Four-ball multifunctional cervical spine massager and neck roller instrument, this neck massager is suitable for most people use. Suitable for massaging neck, head, legs and feet.Features-Material: PP.-Size: About35.00X18.00X2.00cm/13.76X7.07X0.79inch.-It is made of high-quality PP material, safe and durable, and can be used with confidence.-The four firm balls can help loosen up the tense muscles by focusing on the main pressure trigger points.-You can press, squeeze and knead to release your tight, stiff and aching muscles on your neck, shoulder or leg.-Can help improve your blood circulation to release your fatigue and improve your sleeping quality to maintain good body energy.-Cost-effective, you can buy this high-quality neck massager at a very affordable price.