4″ to 4.125″ 100-105mm Engine Flexible Cylinder Hone Ball Hone 320 grit. 105mm 4″ 320sc Grit Flexible BallType Hone. Mor-Balls = Better Cross hatch Finish and Longer Hone Life. provides a better ring sealing surface for your Engine rebuilds.
4″ to 4.125″ 100-105mm Engine Flexible Cylinder Hone Ball Hone 320 grit. 105mm 4″ 320sc Grit Flexible BallType Hone. Mor-Balls = Better Cross hatch Finish and Longer Hone Life. provides a better ring sealing surface for your Engine rebuilds.