Extension Spring Ultra Precision High Carbon Steel Plain End Type Full Twist Loops Overall Length 1 1/4 In Outside Dia 0.360 In Wire Dia 0.045 In Load 10.20 Lbs Deflection @ Load 0.68 In Initial Tension 0.90 Lbs Spring Rate 13.6 Lbs/In Meets/Exceeds ASTM A228 and AMS 5112 Package 3