Our Induction Aluminum Circle stands out due to the latest bottom-coating technology and high-quality stainless steel bottom-coating. We use 410 grand steel for the bottom coating, a material renowned for its exceptional properties. It has high hardness, toughness, good corrosion resistance, and most importantly, excellent heat resistance.is very suit for cookware. https://www.lanrenaluminium.com/induction-round-aluminium-disc