Sash Cord

A sash cord is a cord or chain used within the frame of double-hung windows that works on a pulley to help raise and lower the window easily within its frame. It is commonly a solid braid cotton with various fibre cores.

WIKIPEDIA ENTRY FOR SASH WINDOW.

Sash Window Picture   Sash Window 2 Picture

Sash Window 4 Picture   Sash Window 4 Picture