Extension Spring, Ultra Precision, 302 Stainless Steel, Plain, End Type Full Twist Loops, Overall Length 3 In, Outside Dia 0.300 In, Wire Dia 0.037 In, Load 6.26 Lbs, Deflection @ Load 2.94 In, Initial Tension 0.56 Lbs, Spring Rate 1.91 Lbs/In, Meets/Exceeds ASTM A313 and AMS 5688, Package 3