Compression Spring Precision High Carbon Steel Music Wire Finish Plain Overall Length 1 1/2 In Outside Dia 0.360 In Wire Type Round Wire Dia 0.045 In End Type Closed and Ground Compressed Length 0.586 In Load 11.7 Lbs Deflection @ Load 0.65 In Spring Rate 18 Lbs/In Meets/Exceeds ASTM A228 Package 5