30" Baltic Birch Shelf with Plexi Glass Back | Eco-Friendly Classroom Storage*Ships 23 business days from warehouse stock. The 30" Baltic Birch Shelf with Plexi Glass Back is a practical and versatile storage solution designed to meet the needs of early childhood educators. This high quality shelving unit features a transparent plexi glass back that provides excellent visibility, allowing children to easily locate the materials they need while offering teachers a clear view of the classroom for supervision. This feature is