... steel. Assorted Product:1. Portable oil-free piston vacuum pumpType: ZKB-1AUltimate vacuum: ≥0.08MpaMaximum air-flow: 22L/min2. Oil ... 79L/min3. Vacuum Liquid Storage TanksCapacity: 1L, 2L, 3L, 4LWith preventing Overflow Tool, liquid lever display4. Membrane Filter for microbiological ... 0.22μm×200pieces/box, Individual Pack, sterilized5. Membrane Filter for Microorganism analysisΦ47×0.22μm×200pieces/box ...