Music Wire Stainless Steel 302 Round 166 ft Overall Length Wire Gauge 21 ga Package Type Dispenser Box Coil Weight 1 lb Package Weight 1 lb Feet Per Pound 166 ft/lb Heat Treatment Full Hard Spring Tempered Tensile Strength 267 000 psi Application Armature Binding Ceramic Cutting Control Linkages Springs Wire Forms Includes Material Certificate Yes Gauge 21 ga Standards AMS 5688 ASTM A313 ASTM A555 ASTM A580 System of Measurement Inch 0.0475 in Thickness