Cross groove design: The back of the linear connector is a cross groove for fixing the plastic panel. The plug-in slot design increases friction, and there are 8 card slots in total, providing a more secure connection. Environmental protection material: The plastic connector for the metal case is made of ABS plastic, non-toxic and odorless, and can be used indoors for a long time. Very durable and will not be damaged. Shelf accessory: Storage cube connector can expand your modular shelves according to your wishes. The shelves and cabinets can be assembled at will, which is convenient and simple, economical and practical. 40 plastic cube connectors can meet your different needs. Widely used: Plastic connectors can be used to simply assemble home cabinets, shoe cabinets, storage cabinets, flower pot racks and other shelves. It is a great choice for expanding storage space. Easy to use: Insert the panel to be assembled into the slot of the interlocking plastic connector, making sure all