Extension Spring, Safety Drawbar, 302 Stainless Steel, Plain, End Type Closed Drawbar, Overall Length 8 In, Outside Dia 2.100 In, Wire Dia 0.312 In, Load 365.97 Lbs, Deflection @ Load 2.19 In, Spring Rate 167.11 Lbs/In, Meets/Exceeds ASTM A313 and AMS 5688