Extension Spring, Ultra Precision, 302 Stainless Steel, Plain, End Type Full Twist Loops, Overall Length 2 In, Outside Dia 0.300 In, Wire Dia 0.055 In, Load 18.52 Lbs, Deflection @ Load 0.60 In, Initial Tension 1.67 Lbs, Spring Rate 27.98 Lbs/In, Meets/Exceeds ASTM A313 and AMS 5688, Package 3