... , not easy to be changed the shape, and the back part we use ABS/PS material, it's good in ... classic and beautiful, and feels thickly and full.2. Tinplate Back Badge MaterialThis is also made by 4 part as belowThe ... the tinplate is not good enough, the tinplate cover and back is easy to be changed the shape, for making ... material when we arrange production.Our workmanship as below: Pin Button Material