EXTENSION SPRING, ULTRA PRECISION, 302 STAINLESS STEEL, PLAIN, END TYPE FULL TWIST LOOPS, OVERALL LENGTH 1 1/2 IN, OUTSIDE DIA 0.300 IN, WIRE DIA 0.055 IN, LOAD 18.52 LBS, DEFLECTION @ LOAD 0.40 IN, INITIAL TENSION 1.67 LBS, SPRING RATE 41.63 LBS/IN, MEETS/EXCEEDS ASTM A313 AND AMS 5688, PACKAGE 3