What is the material of 304ep

Polypropylene. 304 stainless steel tube electrolytic polishing EP, is the anodic erosion of metal parts under specific conditions, belongs to the polypropylene material, the material can improve the micro-geometry of the metal surface, reduce the microscopic roughness of the metal surface. 304ep is a stainless steel material, commonly used in the production of kitchen utensils, chemical equipment, medical equipment and so on.