1pack ZoroSelect 1NBJ3 Ext Spring Ultra Precision 1 1/4 OAL PK3 Extension Spring Ultra Precision 302 Stainless Steel Plain End Type Full Twist Loops Overall Length 1 1/4 In Outside Dia 0.360 In Wire Dia 0.037 In Load 5.13 Lbs Deflection @ Load 1.14 In Initial Tension 0.43 Lbs Spring Rate 4.08 Lbs/In Meets/Exceeds ASTM A313 and AMS 5688 Package 3