Insize ISR-CSE315, SURFACE ROUGHNESS SPECIMEN, 8pcs per set, 6928640376566

Machining method surface grinding.
Ra: .1, 2, 4, 8,16,32,63,125_in. Rz: 11.8,22.1,36.3,69.6,104,186,315,625_in.
For checking, identifying and specifying the roughness by symbol.
Rust-proof, made of pure Nickel.