... up to the client 3) Color:zinc plated,plain self tapping screw 6x70:1)Material:carbon steel,iron2)Size:It's up ... to client's requirements3)Color:zinc,black,plain,black phosphated4)Head ... type:flat head,pan head,bugle head,truss head,hexagon head5)Recess:philips,slotted,cambo,square ...