DigimaticTubularInsideMicrometers-Series337-ExtensionRodType/Series339-ExtensionPipeTypeSeries 337,339 FEATURES:WiderangeofIDmeasurementsbycombiningextensionrods(pipes)andanvilswiththemicrometerhead.The339seriesuseshighly-durableextensionpipes.Carbide-tippedmeasuringfaces.TechnicalDataAccuracy: (3+n+L/50) m**n=Numberofrod,L=Maximummeasuringlength(mm),Fractionroundedup,Excludingquantizingerror(337series)Resolution:0.001mmor.0001 /0.001mmDisplay:LCDBattery:SR44(1pcs.),938882Batterylife:Approx.8monthsundernormaluseFunctionZero-setting,Datahold,Dataoutput,Preset,inch/mmconversion(inch/mmmodels)Alarm:Lowvoltage,CountingvaluecompositionerrorOptionalAccessory05CZA662:SPCcable(1m)05CZA663:SPCcable(2m)