Unifiltech Bag-Pure-I Oil Absorbable filter bags employ polypropylene melt blown super fine fibers with unique graded filtration technology, offering absolute particle removal efficiency and super long service life. The filter bags are composed of 12-layer super fine fiber medias of which pore sizes are graded design from inside to outside that provide high loading capacity with low initial pressure drop. The outer layers of the bag provide good pre-filtration for inner final particle filtration. The super fine fibers and large media surface area result in good trace oil absorbable capability. The bags are available of absorbing oil over 50 times the filter own weight.