Check the listing for details. 2 Pcs 3" Square Galvanized Duct Connector Flange, Silver Tone. Condition: New. Listed at 33.40 USD. MULTIPURPOSE - This duct connector flange is widely used in homes, offices, kitchens, factories, apartments, etc for connecting air ducting, including metal spiral ducts, flexible ducts, PVC pipes, etc. It suits bathroom fans, extractor fans, chimneys, stoves and fireplaces, tumble dryers, In-line extract fans, dust collection systems, hydroponics setups, etc.WHAT YOU GET - The package comes with 2 Pcs Silver Tone galvanized steel duct connector flanges that measure 160 x 160 x 55 mm/6.3 x 6.3 x 2.2 Inch (L*W*Interface H) with 0.6mm/0.02 Inch thickness. Its Interface Outer Diameter is 80mm/3 Inch. Screw Holes Diameter is 9mm/0.35 Inch. Screw Holes Distance is 130mm/5 Inch. Folded Edge Height: 20mm/0.8 Inch. Screws are not provided.