Machining method: cylindrical lapping.
Ra: 1, 2, 4, 8_in. Rz: 18, 22, 25, 49_in. Quantity 4pcs; superfinishing. Ra: 1, 2, 4, 8_in. Rz: 14, 28, 40, 56_in. Quantity 4pcs.
For checking, identifying and specifying the roughness by symbol.
Rust-proof, made of pure Nickel.

3M 54135, Scotch-Brite Roloc AL Surface Conditioning Disc TR, 2 in x NH A VFN, 7100075708, 200 per case
Insize ISO-2000FN, COATING THICKNESS GAGE, main unit, 6928640324642
3M 09413, Scotch-Brite Contour Surface Paint and Varnish Remover 9413NA, 7000052005
3M 12954, Scotch-Brite Roloc Surface Conditioning Disc, TR, 4 in x NH A CRS, 12954, 7100007009, 100 per case 