Extension Spring Utility Standard Steel Oil End Type Machine Half Loop Overall Length 13-21/32 in Outside Dia 1.380 in Wire Dia 0.180 in Fabric Sleeve Outside Dia 1.56 in Load (Lbs.) 27.00 Deflection @ Load 1.00 in Spring Rate (Lbs./in) 15 Meets/Exceeds ASTM A227/A228 and AMS 5112 Package Quantity 6