Extension Spring, Ultra Precision, 302 Stainless Steel, Plain, End Type Full Twist Loops, Overall Length 1 In, Outside Dia 0.180 In, Wire Dia 0.029 In, Load 5.06 Lbs, Deflection @ Load 0.43 In, Initial Tension 0.45 Lbs, Spring Rate 10.6 Lbs/In, Meets/Exceeds ASTM A313 and AMS 5688, Package 3