' Music Wire, Spring Steel, Min. Tensile Strength (PSI) 318, 000 - 352, 000, Total Length 60 ft., Package Type Tube, Thickness .039 In., Feet per Lb. 248, Thickness Tolerance +/-0.001 In., Application Making Custom Size Springs, Pack Count 20, Meets/Exceeds ASTM A228, Package Weight 0.2, Package Quantity 20 '