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            Xnrtop 12mm to 16mm Shaft Coupling 40mm Length 32mm Diameter Stepper Motor Coupler Aluminum Alloy Joint Connector for 3D Printer CNC Machine DIY Encoder ( Pack of 2
        
        
     
 
                         
                        
                            
    
    
        
        
            Xnrtop 5mm to 8mm Shaft Coupling 25mm Length 20mm Diameter Stepper Motor Coupler Aluminum Alloy Joint Connector for 3D Printer CNC Machine DIY Encoder ( Pack of 2
        
        
     
 
                         
                        
                            
    
    
        
        
            Xnrtop 8mm to 12mm Shaft Coupling 30mm Length 25mm Diameter Stepper Motor Coupler Aluminum Alloy Joint Connector for 3D Printer CNC Machine DIY Encoder 2pcs
        
        
     
 
                         
                        
                            
    
    
        
        
            Xnrtop 4mm to 8mm Shaft Coupling 25mm Length 18mm Diameter Stepper Motor Coupler Aluminum Alloy Joint Connector for 3D Printer CNC Machine DIY Encoder ( Pack of 2