Extension Spring, Ultra Precision, High Carbon Steel, Plain, End Type Full Twist Loops, Overall Length 3/4 In, Outside Dia 0.360 In, Wire Dia 0.045 In, Load 10.20 Lbs, Deflection @ Load 0.12 In, Initial Tension 0.90 Lbs, Spring Rate 76.5 Lbs/In, Meets/Exceeds ASTM A228 and AMS 5112, Package 3