Featuring pre drilling screw holes for easy wall mounting and integrated hose clamps, this adapters ensures airtights airflows between appliances and ducting systems The pmolded square to round designs minimizes airflows and leakage, ensuring energy efficient operations of ventilation equipment while maintaining indoor air standard Efficiently connection square ducts to round ventilation systems with duct connectors flanges, crafted from for resistance and long time in heating, cooling, or exhaust applications Optimizes airflows in laundry room, commercial kitchens, or indoor gardening space by secure attaching exhaust hoses to inlines fan, ranges, or HVAC systems this universals flanges Designs for homeowner, contractors, and enthusiasts seek ventilation solution for dryers, kitchen supplies, or hydroponic setups requiring square to round conversions, Manufacturer: Zeizafa