A Membrane Filter Assembly typically consists of components used for filtration processes in laboratories, particularly for microbiological analysis, water testing, and sample preparation. The components you mentioned—joint, cup, and clamp without the flask

• Membrane Filter Holder/Cup: Holds the membrane filter in place. It is where the sample is poured, and the filtration process occurs. The cup usually has a porous support base for the membrane.
• Joint (Usually a Glass or Stainless Steel Connector): Connects the filter holder to the filtration system or the vacuum line. It ensures a tight and leak-proof connection.
• Clamp: Secures the components together, maintaining a tight seal to prevent leaks during filtration. The clamp is crucial for holding the cup and joint firmly together.