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For checking, identifying and specifying
the roughness by symbol
Accuracy: +20% ~ -25%, Ra<0.1µm
Accuracy: +12% ~ -17%, Ra>0.1µm
Meets ISO 2632 (ISR-CS329 meets ISO 8503/1)
Rust-proof, made of pure Nickel
Roughness (Ra) : 0.8, 1.6, 3.2, 6.3, 12.5, 25, 50, 100µm
Roughness (Rz): 3.84, 6.7, 12.2, 25.2, 48.7, 99.9, 190, 361µm