Extension Spring, Safety Drawbar, High Carbon Steel, Zinc Plated, End Type Closed Drawbar, Overall Length 13 3/4 In, Outside Dia 1.625 In, Wire Dia 0.250 In, Load 247.50 Lbs, Deflection @ Load 1.65 In, Spring Rate 150 Lbs/In, Meets/Exceeds ASTM A227