Product Material: environmentally friendly rubber 1.VERSATILE ; UPGRADED: This upgraded muscle roller stick is built with a solid core tube, and the 10 gears are designed with a tread design.Unlike others, the gap between our gears is specially designed so that it can provides more deep tissue massage and getting muscle relief more quickly. It has a 0.5cm gap between each gear for greater flexibility and to avoid getting any hairs caught in the way 2.QUICK RECOVERY--DEEPER RIDGES: This upgraded massage tool provides more deep tissue massage for foot, calves, legs, hamstring, back, glutes, quads, arms, neck, sciatica, back and shoulder. Very efficient for relieving the pain such as shin splints, plantar fasciitis, sciatica, restless leg syndrome, tennis elbow,etc, to ease muscle soreness, aid recovery, reduce stiffness and pain before and after workouts 3.DURABLE ; HIGH QUALITY Deeper Ridges MATERIALS: This upgraded massage stick roller is made with industrial strength materials, polypropylene handles,TPR Anti-slip Mat . 4. ANTI-SLIP HANDLE: Dual grip handle with convex points design helps you hit those hard-to-reach spots and allows for uncomplicated self-massages,Give your muscles the treatment Color: black Size: 44*4*4cm Delivery Quantity: 1 Piece