12-Position Manifold Vacuum Kit Solid Phase Extractor 12-Channel Manifold Vacuum Kit Solid Phase Extraction Device        12 Position Vacuum Manifold Kit Holds 12 cartridges and can be used with 1, 3, 6, 12, or 25 mL columns. The manifold is equipped with a vacuum port for connection to a standard laboratory vacuum pump. A vacuum pulls the sample through the stationary phase, metered by a stopcock to control the speed of the extraction process and sample flow. Spent and wash solvents are discarded and analytes are collected in sample tubes below the manifold, completing the extraction Manifold kit includes: 1 glass exchange chamber (12 positions) 1 cover spacer (12 positions) 1 tube/vial holder (12 positions) 1 basin (complete with vacuum gauge, valve and gasket indicating required pressure.) 12 stopcocks (12 positions) scope Number of holes: 12 holes Vacuum glass tank material: quartz sand Studio: 290*70*138mm Air control mode: independent control of each hole Suitable for: test tubes/centrifuge tubes/sample bottles The number of samples that can be processed at the same time: 12 holes Weight: about 4.5 kg Relative humidity: