This is the Great Planes ElectriFly Collet Cone Adapter 4mm-1/4-28.       
                                                                               
FEATURES: Aluminum construction, Silver in color                               
          Mounts on electric motors with a 4mm shaft and adapts them to a      
           1/4-28 diameter prop shaft                                          
          Cone shaped spinner nut adds good looks                              
                                                                               
INCLUDES: One 4mm Prop Shaft                                                   
          One Aluminum Knurled Prop Hub                                        
          One Aluminum Prop Washer                                             
          One Aluminum Spinner Nut (1/4-28 threaded)                           
                                                                               
REQUIRES: Installation                                                         
                                                                               
SPECS:    Length: 1.61" (41mm) as assembled                                    
          Length: 1.31" (33.3mm) shaft only                                    
          Length:  .94" (24mm) spinner nut only                                
          Shaft Diameter: 1/4-28                                               
          Spinner Nut Diameter: .59" (15mm) at the widest point                
                                                                               
COMMENTS: For the version without a spinner nut order GPMQ4965.