Extension Spring, Ultra Precision, 302 Stainless Steel, Plain, End Type Full Twist Loops, Overall Length 2 3/4 In, Outside Dia 0.500 In, Wire Dia 0.063 In, Load 16.34 Lbs, Deflection @ Load 1.85 In, Initial Tension 1.48 Lbs, Spring Rate 7.99 Lbs/In, Meets/Exceeds ASTM A313 and AMS 5688, Package 3