Amerimax 2 lite sliders are the perfect replacement for those old aluminum sliders.  They come with full screens.  Both sash can be lifted so you can clean the outsides from the comfort of your home.  All windows come with Low -E² glass and Super Spacer.  Both styles are available in either white or desert sand.

The three lite slider is a fixed center unit with operating sash on either side.  The window can be split into thirds or can be one fourth/one half/one fourth.  These windows can maximize the window area of a large opening and still allow for ventilation.