For tubes 14" (356mm) I.D.
Recommended for removing soft and light scale deposits in straight, ferrous and nonferrous tubes. Order brush to correspond to tube I.D. (Not recommended for stainless steel tubes.)
Note: TCB Brushes require a #TCB-C Coupling ($8.00) to connect to GTC-720, GTC-721, GTC-721G
and GTC-821 Flexible Shafts. (One coupling is supplied with each brush order.)