Product Name: Surfaces Roughness Tester. Measurement Parameters (μm): Ra, RZ, Rq, Rt, RP, RV, RC. Stroke Length: 5.6 mm. Sampling Length: 0.25, 0.80, 2.50 mm. Evaluation Length: 1.25, 4.0 mm. Measurement Range (μm): Ra, Rq: 0.05-10.0; Rz, Rt, Rp, Rv, Rc: 0.1-50. Indication Error: ±10%. Indication Repeatability: