The Andersen Narroline window was first introduced in 1968, and later discontinued in 2012. During it's 44 year existence over 50 million windows were produced. The window has a vinyl covered frame and sashes that are prefinished on the exterior. Both sashes open, sliding up and down but do not tilt in. The Narroline window has visible "cords" near the jamb tracks. Those cords are attached to the sash balance that allow easy operation of the window sashes.