This product is made of fine quality material, high durability, corrosion-resistant, not easy to rust. Features: High hardness, not easy to deform. 304 stainless steel material, safe and non-toxic, does not pollute the water source. The combination of chromium and nickel produces an antioxidant layer on the surface of the material, which is wear-resistant, rust-resistant and corrosion-resistant. High durability with stainless steel, not easy to rust. Smooth surface, no burr, to meet the requirements of the national standard. Use in a humid environment and the surface will be as shiny as new. Specifications: Item type: Nut Material: Stainless Steel Selection models: M3, M-4, M5, M6, M-8, M-10, M12(optional) Quantity: 5PCS Package weight: M3: 2.5g/0.08ounces M-4: 7g/0.24ounces M5: 9.5g/0.33ounces M6: 15g/0.52ounces M-8: 34g/1.19ounces M-10: 54g/1.9ounces M12: 92.5g/3.26ounces Package size: 1208020mm/4.723.140.78inches Package list: 5pcs * Nuts