Vertical Sliders are transaction window systems ideal for convenience stores, fast food outlets, government offices, and other high profile/high traffic facilities. The vertical slider system, as its name suggests, lifts upward to open, while its counterpart, the horizontal slider, slides side-to-side. The vertical slider system provides a mostly unobstructed countertop space during daytime hours by tucking vertically out of the way. Through the use of counterbalance weights, the bulletproof glass can be lifted open to any height and will stay. When closed employees can maintain communication with customers through one of several talk-thru options, as well as a package passer or currency tray. This system can be locked into place should there be a threat to security. By pushing the slider tightly closed, a plunger pin will activate locking into the bullet-resistant frame so it cannot be opened.