Extension Spring Utility 302 Stainless Steel Plain End Type Crossover Center Loops Overall Length 4 In Outside Dia 1/2 In Wire Dia 0.063 In Load 14.44 Lbs Deflection @ Load 2.25 In Spring Rate 5.06 Lbs/In Meets/Exceeds AISI 302/304 and ASTM A313 Package 3