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Explore Scientific          
Telescope Model OTA Thread  Focuser Adapter    
ES80 Aluminum w/o sliding dewshield M89x1 FTF2535HD A25-2003-23    
ES80 Aluminum w/sliding dewshield  M87x.75 FTF2535HD A25-2003-24    
ES102 Aluminum w/o sliding dewshield M102x1 FTF3035B-A A30-1903ES102    
ES102 Aluminum w/sliding dewshield  M99x.75 FTF3035B-A A30-1903ES102A    
ES102/ES115 Carbon Fiber   4.6" Inside diameter FTF3035B-A A30-1903-ES102CF OR  
    FTF3235B-A A32-3203-ES102CF    
ES127 Carbon Fiber w/o sliding dewshield 4.732" Inside diameter FTF3035B-A A30-1903-ES127    
ES127/140 Carbon Fiber w/sliding dewshield  5.58" Inside diameter FTF3035B-A A30-1903-ES127A    
ES127 Aluminum w/o sliding dewshield M130x1 FTF3035B-A A30-1903-ES130    
ES127 Aluminum w/sliding dewshield M126x1 FTF3035B-A A30-1903-ES130A OR  

  FTF3235B-A A32-3203-ES130A    
ES152/165 Carbon Fiber 6.825" Inside diameter FTF3035B-A A30-1903-ES152 OR  

  FTF3235B-A A32-3203-ES152    
The difference between the FTF3035 focusers and the FTF3235 focusers is that the FTF3035 focusers cannot accept a 3" accessory  
so if you are wanting to use a 3" accessory, you will need to use focuser FTF3235