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■ Internal Diameter：50mm±0.05mm
■ Outer Diameter：86mm±0.1mm
■ Internal Orifice Length：10mm±0.1mm
■ Production Tolerance：±2%
■ Come with calibration certificate
■ Internal Vertical Height（mm: 43±0.1
■ Internal Orifice ф（mm）: 4.12
■ External Orifice ф（mm）: 6.0 ± 0.5
■ Measurement Range（cSt）: 70-370
■ Suitable Flow Time (sec）: 20-105
