Our yoga massage ball is made of solid, high-density oak cork, a renewable and sustainable natural material that is non-toxic and eco-friendly. The cork material is pressed and polished by machine to ensure a firmer and more comfortable texture, making it perfect for massage therapy. By using our massage ball for self-myofascial relief, you can effectively relieve muscle tension, knots, and soreness. Different dimensions of balls fully meet your needs, you can customize this item by adding a silkscreen printed or laser engraved logo for better exposure and promotion of your brand. The prices are based on a diameter of 2.36'', please contact us for more information.