Attention Please 1. During the DIY, make sure that each pipe is inserted into the bottom of the connector, so that the entire shelf can be more stable and bear more weight. Use the small wooden hammer gently knock the oposite sides of the connectors until the panels are aligned. 2. This product is designed to be used for large-area contact products. The panels we use are only non-woven fabrics, which play the role of separation rather than load-bearing. So if a heavy object with a small contact area is placed on it, it may break through the non-woven fabric and fall. Product Specifications Load Bearing per Cube: 10 lbs. Dimensions of Each Cube: 37 x 29 x 28cm/14.6 x 11.4 x 11"( L x H x W) Dimensions of Whole Bookcase: 120 x 125 x 28cm/47.2 x 49.2 x 11"( L x H x W) Package Content 12 x Large Non-woven - Horizontal Placement 13 x Small Non-woven - Vertical Placement 48 x Long Pipe - Horizontal Placement 26 x Short Pipe - Vertical Placement 7 x Plastic Connectors - for Inter (8-hole connector) 10 x Plastic Connectors - for Edge (4-hole connector)..