This assembly is designed to hold a Warner MP-series perfusion manifold. The base has a recess designed for a 12x3 mm circular magnet. The fit is snug, but glue is recommended. The remaining parts are assembled with M3 hex screws. Recesses are provided for M3 nuts, which might require a vice or pliers to snap them in place. The side of junctions between pieces has holes that support direct threading of M3 screws or a manual M3 tap for smooth movement. A set screw through the main support arm allows precise height adjustment, while the entire arm can be easily flipped out of the way of the imaging chamber to change samples.