VWD Overlander Universal Van Bunk Window | 41-5/16" x 16-5/16" (OVR4015)Cut in some airflow and natural light without sacrificing your build's clean aesthetic. The VWD OVR4015 Overlander Bunk Window is a universal fit, flat half slider designed specifically for van bunk areas and cargo walls. With a sleek black aluminum frame and solar privacy glass, it delivers ventilation, light, and privacy in one package and it installs on either side of the van. The clamp ring mounts on walls up to 1 8" thick and doubles as a trim