7900 series windows have radius (rounded) corners with torque awning (crank-out) vents. 
Clamp ring mount. These are flat windows and can be made in an egress (emergency exit) style.  Glass colors: clear, light gray or dark gray. The drawings to the right have a 'V" in the picture for vent.

Sizes shown are actual window sizes.  Hole cut width and height in the unit should be 3/8" larger than the sizes shown.
You may mix the heights and widths but not all combinations are available for every style.
These windows are
SPECIAL ORDER and will require pre-payment.

HEHR Window parts (click here)