For straight tubes 1 1/2" - 2"(38-51mm) I.D. or
For curved tubes 1 3/4" - 2 1/2"(45-64mm) I.D.
Flex Hub Tools incorporate centrifugally activated blades for removing hard and heavy deposits in straight or curved tubes. A drill GTC-231D can be attached to the front of the GTC-231 Fle Hub to clean severly clogged tubes. **Search Accessories for GTC-231D and replacement blade set GTC-231A**