Cylinder Hone, Manufacturer suggested retail price. $21.79 Features and Benefits: For any type and size of cylinder, the FLEX-HONE process (Super finishing) produces a controlled surface condition unobtainable by any other method. It involves finish, geometry and metallurgical structure. A high percentage plateau free of cut, torn and folded metal (with radi used ports). A resilient, flexible, honing tool with a soft cutting action. The abrasive (points) globules each have independent suspension that assures the Flex-Hone to be self-sufficient. Manufacturer: Brush Research 90 day warranty on material and workmanship