Testo-0554-4172-Flow-Straightener-Testovent-417-Testo-0554-4172-P-The-Testo-0554-4172-is-a-Flow-Straightener-Testovent-417-that-enables-a-correction-of-the-swirl-into-a-parallel-flow-from-air-conditioning-outlets-Testo-is-the-only-manufacturer-to-offer-a-solution-for-swirl-outlets-P-Testo-0554-4172-417-Flow-Straightener
