Extension Spring, Ultra Precision, High Carbon Steel, Plain, End Type Full Twist Loops, Overall Length 1 3/8 In, Outside Dia 0.360 In, Wire Dia 0.055 In, Load 17.60 Lbs, Deflection @ Load 0.50 In, Initial Tension 1.60 Lbs, Spring Rate 32.1 Lbs/In, Meets/Exceeds ASTM A228 and AMS 5112, Package 3