Tubine Brush Drive System for PowerScub Models. This air driven turbine is what turns the 5 brushes. Held in place under the cover by 3 screws. Water supply line port is on the white distribution plate. Turbine does not include control rod H-524188001, spring H-692598005 or brush set H-440003857. Models include FH50130, FH50140, FH50145, FH50150-FH50153 & FH50250-FH50252. When sold out price will show $00.00 3/9/23 dda