Detailed Product Description Pipeline Filter, Line Filter for Air ... multi layers of glass fiber, filtrate impurity: 5micron, oil content: 5ppm,P-grade, material: multi layers of ... glass fiber, filtrate impurity: 1micron, oil content: 0.5ppm,S-grade, material: multi layers ... of glass fiber, filtrate impurity: 0.01micron, oil content: 0.01ppm,C-grade,material: activated carbon, ...