Insize ISR-CSE328, SURFACE ROUGHNESS SPECIMEN, 6pcs per set, 6928640376672

Machining method vertical grinding.
Ra: 8, 16, 32, 63, 125, 250_in. Rz: 44, 140, 246, 351, 888, 1632_in. Quantity 6pcs.
For checking, identifying and specifying the roughness by symbol.
Rust-proof, made of pure Nickel.