4″ to 4-1/8″ 100 / 105mm Engine Cylinder Hone Bore Brush Ball 240 Grit USA NEW
4" to 4.125" 100-105mm Engine Flexible Cylinder Hone Ball Hone 240 grit. 105mm 4" 240sc Grit Flexible BallType Hone. Mor-Balls = Better Cross hatch Finish and Longer Hone Life. provides a better ring sealing surface for your Engine rebuilds.