Vallox > Counter flange Counter flange Counter flange Counter flange trim made of galvanized steel sheet for connections. Dimensions and holes comply with the DIN 24155 standard. Category: Helios fans accesories Choose product model Choose model Counter flange FR 180 Counter flange FR 200 Counter flange FR 225 / DFR 200 Counter flange FR 250 Counter flange FR 315 Counter flange FR 355 Counter flange FR 400 Counter flange FR 450 Counter flange FR 500 Counter flange FR 560 Counter flange FR 630 Counter flange FR 710 Technical details Product numbers Technical details Product numbers Choose a model to see technical details Choose a model to see technical details