This two post overhead car lift is with 5mm thickness post, stronger one plate curved carriage and all 2 stages arms design, width pass through. Hydraulic cylinder+chain drive system(cylinder direct drive is opiontal), two-stages posts(one stage is optional) design, make 20ft container maxim load 30 sets be possible. Single point manual unlock release system. Put with weight capacity, CE, warning stickers. also can be added your logo and painted color as your requests. 5mm thickness post for 4 ton capacity, 6mm thickness post for 4.5ton capacity. 
