Extension Spring Utility Standard Steel Oil End Type Machine Half Loop Overall Length 8-3/64 in Outside Dia 1.000 in Wire Dia 0.110 in Fabric Sleeve Outside Dia 1.15 in Load (Lbs.) 16.75 Deflection @ Load 2.00 in Spring Rate (Lbs./in) 3.9 Meets/Exceeds ASTM A227/A228 and AMS 5112