Universal Heat Diffuser and Adapter for Induction Hob Converter Plate – Italiancookshop.com
Amazon.com: Cast Iron Heat Diffuser for Gas Stove – 2 Sizes Included – 8.25 and 6.75 Inch Heat Diffusers for Electric Stove - Gas Heat Plate - Cast Iron Simmer Plate for Gas Burners: Home & Kitchen