... resistant, and with a large flow and high precision. specification: Length: 10'', 20'', 30'', 40'' Diameter: outer diameter 63mm-65mm inner ... diameter 28mm, 30mm Precision: 1, 3, 5, 10, 20, 30, 50, 75, 100 um Technical date: Operation ... Mainly used for the purification of process water and solutions in food and drinks, electronic, pharmaceutical, petroleum and chemical industries ...