Insize ISR-CSE334, SURFACE ROUGHNESS SPECIMEN, 7pcs per set, 6928640376719

Machining method castings.
Ra: 32, 63, 125, 250, 500, 1000, 2000_in. Rz: 128, 320, 640, 1280, 2240, 4480, 9000_in.
For checking, identifying and specifying the roughness by symbol.
Rust-proof, made of pure Nickel.