Harvey manufactures this style window with stainless steel rollers on the bottom of the sash. Most other companies call their style of this window a slider. Sliders do just that, slide vinyl on vinyl. Over time the two surfaces ware down from friction thus reducing the performance of the window. Since Harvey constructs their product with rollers, friction never becomes an issue.

These windows add a clean look to any basement and with the Low-E / Argon option they will also enhance your comfort.