ASSEMBLY INSTRUCTIONS Aa 1pc Bb 2pcs P 1pc M6*20 X 8pcs Y 1pc PF20141 Z 8pcs 1 X Bb Z Aa 2 P ASSEMBLY TIPS: Please use the hardware and accessories included in the set. DO NOT use other electrical or manual tools.In order to facilitate the assembly and make your final product firm and stable, please tighten by a few rounds each screw one by one.After all screws are connected, then you start to tighten each screw to the end.