EXTENSION SPRING, ULTRA PRECISION, 302 STAINLESS STEEL, PLAIN, END TYPE FULL TWIST LOOPS, OVERALL LENGTH 4 IN, OUTSIDE DIA 0.500 IN, WIRE DIA 0.045 IN, LOAD 6.52 LBS, DEFLECTION @ LOAD 7.39 IN, INITIAL TENSION 0.61 LBS, SPRING RATE 0.78 LBS/IN, MEETS/EXCEEDS ASTM A313 AND AMS 5688, PACKAGE 3