Compression Spring, Precision, High Carbon Steel Music Wire, Finish Plain, Overall Length 1 1/2 In, Outside Dia 0.600 In, Wire Type Round, Wire Dia 0.045 In, End Type Closed and Ground, Compressed Length 0.350 In, Load 7.22 Lbs, Deflection @ Load 1.11 In, Spring Rate 6.5 Lbs/In, Meets/Exceeds ASTM A228, Package 5.