straight cutting knife of sewing machine(KM,EASTMAN,MAIMIIN,WOLF) It is suitable for KM,EASTMAN,MAIMIIN,WOLF ect.1)size:4E,5E,6E,8E,9E,10E,11E,12E,13E2)materal:carbon steel,alloy steel,HSS with you optional3)package:gold eagle,neutral package and so on sales at wwkunlun doc com Straight Knives