Extension Spring Utility Standard Steel Oil End Type Machine Half Loop Overall Length 1-5/8 in Outside Dia 0.500 in Wire Dia 0.080 in Fabric Sleeve Outside Dia 0.60 in Load (Lbs.) 26.10 Deflection @ Load 0.25 in Spring Rate (Lbs./in) 72.25 Meets/Exceeds ASTM A227/A228 and AMS 5112