Extension Spring, Safety Drawbar, High Carbon Steel, Zinc Plated, End Type Closed Drawbar, Overall Length 16 In, Outside Dia 1.870 In, Wire Dia 0.135 In, Load 38.09 Lbs, Deflection @ Load 5.00 In, Spring Rate 7.62 Lbs/In, Meets/Exceeds ASTM A227