Diamond Abrasive Products manufactures Blue Aluminum Oxide for Hydraulic/Pneumatic Cylinders Honing. Diamond Abrasive Products is an ISO 9001:2000 certified company. Blue Aluminum Oxide for Hydraulic/Pneumatic Cylinders Honing is suitable for honing of seamless tubes in M.S. Blue Aluminum Oxide for Hydraulic/Pneumatic Cylinders Honing requires no glazing, no loading, and no dressing. Blue Aluminum Oxide for Hydraulic/Pneumatic Cylinders Honing is available in consistent finish.