Was bought at local auction we have other stuff also from the sale if you have any questions ask before buying or use the number on card in last photo. Here are some specs I found online. DONT know if this 100% accurate Kinematica aggregates solve all problems you are faced with every day in the laboratory. Using our Click Go quick release makes the changing of aggregates very easy. BENEFITS Design The universal geometry uses two rows of teeth, is suitable for a large spectrum of laboratory applications, and it is reliable and efficient. Selection and applications ? All standard dispersing taskes ? Grinding of animal and human tissue samples in a variety of fluids and volumes ? Sample preparation for the extraction and dissolution of organic materials ? Sample preparation for medical diagnostic procedures as well as DNA analysis ? Extractions of systems?/?substances from vegetable-derived samples ? Disruption of animal and human cells ? Deagglomeration of united cell structures ? Intensive mixing TECHNICAL INFORMATION Min. Volume (ml) 0.1 Max. Volume (ml) 5 Length (mm) 78 Diameter (o mm) 5 Max. tip speed m/s 5