Product descriptionMaterial :304-A2 /316-A4 stainless steelModel: Metric Square nutsStandard: GBSize:D x S x m = "Inner Diameter" x "Opposite Length" x "Thickness"Such as :M3x5.4x2.4mm (Inner Diameter 3mm, Opposite Length 5.4mm, Thickness 2.4mm)Quantity: Based in your desire