Extension Spring, Ultra Precision, 302 Stainless Steel, Plain, End Type Full Twist Loops, Overall Length 2 In, Outside Dia 0.500 In, Wire Dia 0.055 In, Load 11.38 Lbs, Deflection @ Load 1.60 In, Initial Tension 1.04 Lbs, Spring Rate 6.43 Lbs/In, Meets/Exceeds ASTM A313 and AMS 5688, Package 3