A:AnswerHi - Thank you for reaching out to us. The grates on this range are heavy cast iron grates. There are no other grates available to purchase. All our best! Vikki@GEA
A:AnswerHi there! Thanks for your question. We're happy to help. We found that the knobs on this range are electro-plated plastic but they are weighted so they have the feel of metal knobs without the heat issues. We hope this helps! Emily@GEA
A:AnswerHi FiveCyclones - Thanks for reaching out to us! We appreciate your interest in this slide-in convection range and are happy to answer this for you. This range comes with an extra-large aluminum griddle that is integrated into the center of the cooktop. However, your model is also compatible with the optional JXGRATE1 conventional cast iron center grate that can be interchanged with the griddle for even more cooking flexibility! If you would like to learn more about this accessory or have any additional questions about this range, please feel free to reach back out to us. We are always happy to help! -Eliza@GEA