Description Standards ISO 5627: Determination of smoothness of paper and cardboard (Bekk method) GB 456: Determination of smoothness of paper and cardboard (Bekk method) Included Main machine One power cord One instruction manual Four rolls of printing paper SpecificationsVoltage: AC220V±5% 50HzCapacity: 0-9999 seconds measuring rangeDimensions: 318x362x518mmPressure: 100kpa±2kpaVacuum vessel volume: Large: 380ml, Small: 38ml