In contemporary sash windows, you might be far more prone to look for a spring harmony (or sash equilibrium) system. This is a spring-loaded gadget which counters the power of gravity, in impact holding your sash window open without the need for cords, pulleys and those metallic counterweights.  Initial sash https://best-eyebrow-plucking-too98641.thenerdsblog.com/41388375/sash-windows-options