These membranes are available in pore sizes ranging from 0.1¬µm to 12 ¬µm. Hydrophilic as standard, Cyclopore polycarbonate membranes can also be made hydrophobic upon request. They feature a zero level of non-specific protein binding. The high selectivity of Cyclopore polycarbonate membranes allows precise particle separation and fractionation. Additionally, the smooth and flat surface provides an excellent support for all applications requiring detailed observation of collected samples. Cyclopore's patented membrane technology leaves surfaces perfectly flat and smooth. This characteristic, unmatched in competing products, is of paramount importance for applications using crossflow filtration. These polycarbonated membranes are free of contaminants, have a low tare weight and show negligible water adsorption. Such features make them ideally suited for most types of analytical measurements. Applications include fractionation of particulate aggregates, filtration of critical solutions, crossflow filtration, environmental control, air monitoring and stabilization of beverages.