Extension Spring, Safety Drawbar, High Carbon Steel, Zinc Plated, End Type Closed Drawbar, Overall Length 8 In, Outside Dia 2.100 In, Wire Dia 0.312 In, Load 332.72 Lbs, Deflection @ Load 1.85 In, Spring Rate 179.85 Lbs/In, Meets/Exceeds ASTM A227