Installation Steps: 1. Take out the document rack and lay it flat on the ground, pull the top with both hands to extend the document rack. 2. The bottom double lever is inserted into the base card hole and the middle card key is rotated to fix the lever. 3. The folding information rack is installed, and A4 size books can be stacked. Specifications Name: Magazine Rack Color: Black Material: Iron Place the groove thickness: 2.5cm Hole diameter: 5cm Size: about 132X36X27cm/51.88X14.15X10.61in Weight: 4.8kg Package Content 1 x Literature Rack 1 x English Manual Notice: -- Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering. -- Please understand that colors may exist chromatic aberration as the different placement of pictures.