Extension Spring, Utility, High Carbon Steel, Zinc Plated, End Type Crossover Center Loops, Overall Length 1 In, Outside Dia 5/16 In, Wire Dia 0.035 In, Load 4.65 Lbs, Deflection @ Load 0.43 In, Spring Rate 8.56 Lbs/In, Meets/Exceeds ASTM A227, Package Qty 12