The Quantum Storage Systems DB, also known as the Donut Bumper, is a 3-inch diameter plastic bumper designed to protect walls and surfaces from impacts. It cushions the force of collisions, reducing the risk of damage such as dents or scratches. Its non-marking properties ensure that it won't leave unsightly marks on surfaces. The Donut Bumper is a practical and durable solution for safeguarding walls and surfaces in various settings.