Units available for sample sizes from 200μL to 25mL For use in microcentrifuges, and benchtop and floor model centrifuges Choose from a variety of membrane materials: cellulose acetate, nylon, PTFE, PVDF, and regenerated cellulose Choice of pore sizes: 0.20μm and 0.45μm Feature virgin polyproyplene filter housing and capped, conical receiver tube Units accommodating 200 to 750μL samples are for use in laboratory microcentrifuges; all others for use in benchtop and floor model centrifuges