• filter frame cassette recorders, compact and Pocket flaps

• easy to install in the sewers of ventilating air conditioning systems made from zinc-plated steel or stainless steel

• internal frame profile has pasted gasket w/pp, which, together with the four spring clamps framework provides 100% tightness

• openings on the side walls, which allows you to connect the ram modules and building the so-called. "the walls of the filter in the air czerpniach