Extension Spring Utility Standard Steel Oil End Type Full Twist Loops Overall Length 3-49/64 in Outside Dia 0.630 in Wire Dia 0.110 in Fabric Sleeve Outside Dia 0.74 in Load (Lbs.) 92.42 Deflection @ Load 1.00 in Spring Rate (Lbs./in) 68.4 Meets/Exceeds ASTM A227/A228 and AMS 5112