GB Series Flex-Hone tools are designed for bore diameters from 3-1/4"
thru 4-5/8" and are 13 -1/2" OAL. These standard duty Flex-Hones tools
are commonly used to finish and deglaze block cylinders or liners and
represent a tremendous value on a cost per cylinder basis. Additional
abrasive types and grits are available.
Research GB33432 GB 3-3/4" (89mm) Brake Cylinder Flex-Hone 320SC Grit