Ultrafiltration tube through the centrifugation to remove biological macromolecules which is significantly larger than filter pore size to improve the solute concentration of biological macromolecules, more than 90% recovery. Products are consisted of the tube cap, ultrafiltration intubation and tube body.http://www.guidling.net/tangential-flow-filtration-devices/production-tangential-flow-filtration-system/