Surgical Stainless Steel C-Clasps Metal silver connecting clasps, approximately 50 pieces. - Material: Metal - Type: Jump Rings - Color: Silver - Quantity: Approximately 50 pieces Dimensions: Approximately 3x4 Product Name: ST-0.6C Made in Japan, so the quality is not an issue. Thank you for viewing. Surgical stainless steel is a material that is extremely unlikely to cause allergies among stainless steels, and is called "316L (SUS316L)" in the JIS standard. It has features such as less discoloration, rust resistance, corrosion and heat resistance, and scratch resistance, and is a material used in medical tools and accessories. Thank you for your consideration.