This Louver-Style Window Assembly is made of durable aluminum and is available in a high-mount design. Measuring 27 inches by 18 inches, it can be installed at the center line 51 inches above the frame-top. The continual-seam weldments virtually eliminate moisture trapping, cracking, and fatigue. This product fits most cab rack makes and models and is sold individually. Its practical design and sturdy construction make it a reliable choice for those in need of a high-quality window assembly.