The stainless steel material is sturdy and durable, strong spring, tightly bite, effectively isolates dust and water vapor, and the surface is treated with high-grade wire drawing, and the hand feels delicate and comfortable.430 Stainless steel. Durable to use for years.Featuers a powerful spring that prvides a tight seal for chips.No crack like plastic ones. metalic calmps that won't break and is not as flimsy as plastic ones.Home and office using.Seal chips,cornflakes,milk powder coffee beans, bread,frozen vegetable bag in your kitchen.Can also keep notes,postcards,papers in office.Model No: ESG12260