' Music Wire, Spring Steel, Min. Tensile Strength (PSI) 282, 000 - 312, 000, Total Length 45 ft., Package Type Tube, Thickness .078 In., Feet per Lb. 61.2, Thickness Tolerance +/-0.001 In., Application Making Custom Size Springs, Pack Count 15, Meets/Exceeds ASTM A228, Package Weight 0.85, Package Quantity 15 '