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™ 17379, Versaflo™ Length Adjusting Breathing Tube BT-30, 7100009685, 1 EA/Case
Dynabrade 11476 Dynabelter Abrasive Belt Tool, Heavy-Duty
Dynabrade 90859 1-1/2" Dia., Medium, NWN DynaBrite Quick Change Disc, 25/pack
3M 22393, Roloc Disc 361F, 36 YF-weight, TR, 3 in, Die R300V, 7000045093
Dynabrade 95544 Gear Grease, 2.5oz. Tube
Dynabrade 95848 Dynabrade Gear Oil
Dynabrade 53270 7" (180 mm) Dia. Right-Angle Disc Sander
Insize HDT-LP200-DC, IMPACT DEVICE DC for HDT-LP200, 6940561948431
3M 54135, Scotch-Brite Roloc AL Surface Conditioning Disc TR, 2 in x NH A VFN, 7100075708, 200 per case 