size:
 Thickness 2mm 13X23mm, 14.5X19.5mm
 Thickness 2.5mm 15X22mm, 15X24mm, 15X26mm
 Thickness 3mm 14X17.5mm, 17X22mm
 Thickness 4mm 18X23mm, 20X25mm
 Color: Stainless steel, gold
 Unit price: 2.5 to 3 yuan/piece