Shelving Unlimited is known for our customer service and attentiveness to detail and that is what sets us apart from our competition. We have the custom glass shower doors that are precisely what our Belvidere customers want. Located in north-central Illinois just 75 miles from Chicago, Belvidere is the county seat of Boon County with nearly 26,000 residents. Shelving Unlimited offers a glass shower installation that is reasonably priced and of the highest quality.