Norton Merit Bore Polisher Test Kit, Contains: Samples of B-3, B-4, & B-8 Series Bore Polishers

Aluminum Oxide B-8 Series Bore Polishers, 60 Grit, 10,000 rpm

Aluminum Oxide B-4 Series Bore Polishers, 240 Grit, 20,000 rpm

Aluminum Oxide B-4 Series Bore Polishers, 180 Grit, 22,000 rpm

Aluminum Oxide B-4 Series Bore Polishers, 80 Grit, 20,000 rpm

Aluminum oxide bore polisher from Merit Abrasives at 5/8 to 1 inch with 240 grit, rated 25000 RPM. Fine polish for small interior bores and cylinders.