'Music Wire, Spring Steel, Min. Tensile Strength (PSI) 350,000 - 387,000, Total Length 75 ft., Package Type Tube, Thickness .020 In., Feet per Lb. 937, Thickness Tolerance +/-0.001 In., Application Making Custom Size Springs, Pack Count 25, Meets/Exceeds ASTM A228, Package Weight 0.4, Package Quantity 25'