Extension Length: 252 cm;                                      
A step ladder height: 126.5cm;                              
Scaffold Height: 71 cm;                                     
Number of rungs: 4foldsx2steps;                          
total  steps：8 STEP;                                     
Space between two rungs: 28 cm;                                
Aluminum mode:6063;                                    
Thickness of Aluminum:1.2mm.