This is a Sleek Design with Ultra Fine Mesh that Ensures a Particle Free Steeping. Its  Made of grade 304 stainless steel: high-quality material that makes these tea balls safe to use, durable and resistant to rust. It also Features chain and a twist lock mechanism with a large size giving your tea room to expand. Perfect for medium to large tea leaves but NOT suitable for ground tea or very fine tea leaves. Fits the Majority of Cups & Mugs, Make the perfect tea every time  in just three simple steps -- Stainless Steel Tea Infuser makes it so easy, Measure the perfect amount of tea every time with our specially designed infuserAllow the water to perfectly steep your tea with our high capacity design that promotes water flow, Finally remove the infuser, relax, and enjoy - when your done our infuser is easy to clean.