Enameled cast iron gas ring reducer,Controls the heat of a gas range. Sits on stove tops and acts as a stabiliser for smaller cookerware,like tea kettles,sauce pans,butter warmers,omelette pans,Turkish warmers, stovetop coffee Diffuses and absorbs heat evenly for enhancing energy efficiency,Handwash only Cast iron with high heat resistant coating; Extremely durable and long lasting Size:Dia12cm*12cm*H0.3cm