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                  Tilted Donut with Balls & Zigzag, 2013
                      
                     
              
              
                
                  
                  Tilted Donut with 3 balls, 2001
                      
                    Tilted Donut No. 7, 2008
                      
                     
              
              
                
              
              
             
              
              
                
                  
                  Stainless Steel Donut No. 7, 2012
                      
                     
              
              
                
                  
                  Donut with Balls and L, 2002
                      
                     
        
        
      
           
        
        
      
           
        
        
      
           
        
        
      
           
        
        
      
          