1.Solid Type stainless steel - superior strength and rust resistance over other stainless grades 2.Rustless- stainless steel material, no rust in humid environment, super antioxidant ability 3.Corrosion Tesistance- Combination of nickel and chromium, acid-resisting, alkali-resisting and corrosion-resisting 4.Safe Quantity-No release of harmful substances, environmental protection, non-toxic and non-polluting 5.Welded O Rings ideal for handbags, belts, ornamental designs, shop and farm, crafts Product Name : Welded O Ring Outer Dia : 50mm/1.97nch Thickness : 5mm/0.2inch Material : Stainless Steel Color : Silver Tone Package Content : 10pcs x Welded O Ring