Grover 304G Sta-Tite Mandolin Machine
                                
                                
                             
                            
                         
                            
                            
                        Grover 304G Sta-Tite Mandolin Machine, Machine Heads for Mandolin, 4-On-A-Plate configuration: 4 left / 4 right, Open, Gear ratio: 14:1, Engraved base plate, Metal shafts, Shaft diameter: 6 mm, Shaft spacing: 23 mm, Finish: Gold