Insize ISR-CSE321, SURFACE ROUGHNESS SPECIMEN, 8pcs per set, 6928640376627

Machining method end milling.
Ra: 16, 32, 63, 125, 250, 500, 1000, 2000_in. Rz: 76.8, 153, 258, 488, 1011, 1992, 3704, 7620_in.
For checking, identifying and specifying the roughness by symbol.
Rust-proof, made of pure Nickel.