Extension Spring, Utility, High Carbon Steel, Zinc Plated, End Type Crossover Center Loops, Overall Length 4 In, Outside Dia 7/16 In, Wire Dia 0.048 In, Load 7.79 Lbs, Deflection @ Load 3.41 In, Spring Rate 1.9 Lbs/In, Meets/Exceeds ASTM A227, Package 6