Extension Spring Utility Standard Steel Oil End Type Machine Half Loop Overall Length 15-19/32 in Outside Dia 1.560 in Wire Dia 0.210 in Fabric Sleeve Outside Dia 1.77 in Load (Lbs.) 78.72 Deflection @ Load 2.10 in Spring Rate (Lbs./in) 16.06 Meets/Exceeds ASTM A227/A228 and AMS 5112