MidlcokBL: 500KNWeight: 4.5kg Self-hanging stackerBL: 420KNWeight: 2.8KG Self-hanging stacker (Flangeless)BL(Shear): 420KNWeight: 2.2kg Bottom stacker, single BL: 420KN Weight: 2KG Bottom stacker, double transversal BL: 500KN C-C distance(mm): 203216258Weight: 88.28.8KG Bottom stacker, double longitudinal BL: 500KN Weight: 10.5KG