COMPLETE Opti-Chem 24-Position Parallel Purification Tower. The Opti-Chem Personal Parallel Purification System puts purification and work-up in the hands of every synthetic chemist with fast and reliable results.Designed to match the requirements of drug discovery applications, a variety of Opti-Chem micro titer plate footprint collection blocks holding standard vials and tubes are available. These blocks are compatible with all centrifuge vacuum evaporators that use this common footprint.The Opti-Chem Personal Parallel Purification Tower is constructed from high quality, inert materials allowing all common solvents and buffers to be used with standard filtration, SPE, SS-LLE and silica packed columns.OP-6601-104 Consists of the Following:2 each: OP-6601-12 Cartridge Holder, 24-Position4 packs: OP-6601-50 TFE Needles, 12/pack1 each: OP-6601-01 Base with Uprights***Note: Positive Pressure Manifold is NOT included in the above kit and must be ordered separately***