ring dies flat die D./I.D.X WIDTH, dimpling or corrugation ... out surface. Material is C45,C50, 20CrMn,100 Cr6, ring dies: flat dies, Normally they are (C50),(20MnCr5)and(100Cr6). suit for ... the products: CPM, Buehler, matador, Mabrik, Paladin,UMT, Lamec. ring dies/ pellet dies/ flat dies