Our product is produced in 3mm MDF and silver plexiglass. Our product is 3 pieces and the size of each product is 23*14 cm. THERE ARE NO SIGNS OF RUST ON OUR PRODUCTS. THERE IS A PROTECTION FILM ON IT, PLEASE REMOVE THE PROTECTION FILM. PROTECTION FILM PROTECTS BURNS, SCRATCHES, ETC. FROM LASER CUTTING. PREVENTS SUCH SITUATIONS. It is sent with double-sided tape so that you can apply it to the back of our paintings. (DO NOT FORGET TO REMOVE THE TAPE) There is protective gelatin on the mirrored plexi parts to prevent scratching. Take it out.