Extension Spring, Ultra Precision, High Carbon Steel, Plain, End Type Full Twist Loops, Overall Length 3 1/2 In, Outside Dia 0.500 In, Wire Dia 0.045 In, Load 7.50 Lbs, Deflection @ Load 6.14 In, Initial Tension 0.70 Lbs, Spring Rate 1.10 Lbs/In, Meets/Exceeds ASTM A228 and AMS 5112, Package 3. This item has been restricted from sale in the following state (s): []