These springs are for a small bathroom non tilt out window (home built 1981). Sash weighs about 6 pounds (still in tracks). End pin is series 500 (5/8 dia 24 in long). In your listing the choices are red or blue. Which one do you recommend?
Would it be possible to create a chart on your site showing the weight ranges of springs relative to the plastic colors?
Thanks,
Jim
