http://www.shelfmanufacturers.....com/supermarket-equi welding or screw connection. Secondly, this product is made of wood. The advantage of our product is that the support structure is made of steel. The structure of steel structure is simple, easy to disassemble, durable and easy to transport. It is suitable for large supermarkets, convenience stores, fruit and vegetable stores. Finally, we welcome our customers to make inquiries or purchases. Other informations Minimum order