Diameter: 0.1 inch (2.5 mm); Length: 3.9 inches (100 mm); Material: SUS304; Hardness: over HV300; Surface Roughness: Less than 1S; Product Details: This standard is a product that is standardized by our company using JIS B1354 parallel pins. We have prepared everything from the smallest pack to mass produced products in order to make it available in a wide range of sizes.