A: The selection is mainly based on the size and weight of the prefabricated components, the stress of the connection parts and the design requirements of the building. Generally speaking, for large wall panels or components subjected to large loads, the precast wall connection loop boxes with larger specifications and higher load-bearing capacity should be selected; while for small components or parts subjected to smaller forces, products with smaller specifications can be selected. At the same time, it is also necessary to consider the connection and matching of the precast wall connection loop boxes with the prefabricated components to ensure the convenience of installation and use.