I have 2 questions:
* How tall is this rack?
* Can it be safely used in a microwave?
Answer Hello Max! Yes, the microwave convection rack 4452220 can be used inside a microwave and is approx 14" in diameter. We will need your microwave model number to verify if this rack can be used in your unit. Thanks!
What is the rack made of? Could you substitute with something else?
Answer Hello Wilson. Sorry, but the manufacture does not provide the materials used in the manufacturing of the parts. Based on the model number, you will need to order 4452220 for the correct convection rack. Hope this helps.