P-345 MAIN SPRING: 1″ wide, 5/8″ center arbor with “Z” bend inner end, outside end has pear shaped hole, .018 thick, 14 1/2 feet long. Ideal for those early VV-IV phonographs that require the weaker spring (later model VV-IV’s have a thicker spring and are more difficult to crank.) Please note: Springs are NOT returnable. Extreme caution must be used when working with mainsprings! Not responsible for damages or accidents!