The mounting plates “conductive” are alternatively made of aluminum or high-grade steel/galvanized steel sheet. The mounting plates “isolated” are alternatively made of plastic or bioplastic For part number see here ==> See also accessories.
part number mounting plate, isolated (press cardboard)
part number mounting plate, isolated (bio press cardboard)
part number mounting plate, conductive (aluminium)
part number mounting plate, conductive (steel sheet)