Pentek BN-420-100 Bag Filters Also branded as: Pentek / Ametek / Culligan / Kleen Plus / Plymouth Products / Pentair / American Plumber / Bruner / US Filter BP Series Pentek Industrial BN-420-100 (Nylon Monofilament) Bag Filters feature a thermally-welded, unique design that results in consistent filtration efficiencies. Higher productivity can be achieved with faster bag change-outs. The semi-rigid cylindrical design is easily crushed and incinerated. Applications: | • acids | • micro-organisms | | • alkalis | • oils | | • corrosive fluids | • organic solvents | | | |