Extension Spring, Safety Drawbar, High Carbon Steel, Zinc Plated, End Type Closed Drawbar, Overall Length 8 1/2 In, Outside Dia 1.875 In, Wire Dia 0.250 In, Load 222.00 Lbs, Deflection @ Load 1.85 In, Spring Rate 109.6 Lbs/In, Meets/Exceeds ASTM A227