superior bench buddy BB100 pictured
Impregnated with a special super fine abrasive, Bench Buddy brushes easily remove small burrs and polish the inside of a valve bore with virtually no enlargement of the bore diameter itself. Each Bench Buddy kit features 4 different sized brushes.
* Improves the surface finish of a bore by up to 50% * Restore smooth valve operation in seconds * Services bores from 1/4" to 1" in 4 Brush sizes 3/8, 1/2, 5/8, and one inch
Superior Bench Buddy 3 brush set AB100 for larger accumulator piston bores at 1 3/8, 1 5/8 and 2 inch sizes.
eBay, filter for price, there was a guy on there selling everything at 40% below everybody else. Yeah they pricey.