Insize ISR-CSE329, SURFACE ROUGHNESS SPECIMEN, 8pcs per set, 6928640376689

Machining method: grit blasting.
Ra: 128, 420, 720, 1000_in. Rz: 768, 2520, 4320, 6000_in. Quantity 4pcs; shot blasting.
For checking, identifying and specifying the roughness by symbol.
Rust-proof, made of pure Nickel.