roundness measuring equipment 
       
      
            
          
        
      
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 Our Steel Ball Factory mainly focuses on high precision miniature steel ball manufacture and development. High precision stainless steel ball, chrome steel ball, glass ball and plastic ball, especially the size range from 0.5mm to 6.0mm, the precision up to Grade 5, are the main products we engage in.