Filter Bag Frame 1. Material: stainless steel 2. Various style 3. ISO9001:2000 approved 4. OEM accept ThreeO Filter Bag Frame 1. Features:Light weight, easy to install and maintainSmooth, straight 2. Recommend Size:DiameterDiameter of bagLength115120200024002800125130320036004000147152440048005200 3. Pictures: 4. Test: