The upgraded version of the hind legs has been specially designed to achieve better versatility by optimizing the current front and rear leg structures. It has been optimized through a refurbished profile with higher strength. The structure of AL6005-T5 Front And Rear Leg Rack PLUS is part of Flat Roof Mounting or Metal Sheet Roof Mounting, assembled by inner and outer tubes, with a height of 390mm for height or tilt adjustment. By adjusting the tilt angle of the entire solar system, this structure can increase power output by 20% compared to conventional solar installation layouts on metal sheet roofs. The basic design of this structure facilitates stable connection with kliplocks and fixed devices. The structure can guarantee the performance for 25 years, and is widely used in Chinese Mainland, Southeast Asia and EU countries.