Metal, 36.5cm x 27.5cm, no longer needed due to a malfunction. There are no major rust spots or scratches, but there is some dirt that won't come off. Compatible models: RE-SD18A-B, RE-SD18B-B, RE-W185J-B, RE-WF18A-B, RE-WF18A-W, RE-WF181-B, RE-WF181-W, RE-WF182-B, RE-WF182-W, RE-WF183-B, RE-WF183-W, RE-WF184-B, RE-WF184-W, RE-WF185-B, RE-WF185-W, RE-WF186-B, RE-WF186-W Thank you for looking.