Check the listing for details. 10" Square Galvanized Duct Connector Flange, Silver Tone. Condition: New. Listed at 37.24 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 1 Pcs Silver Tone galvanized steel duct connector flanges that measure 320 x 320 x 40 mm/12.6 x 12.6 x 1.6 Inch (L*W*Interface H) with 0.6mm/0.02 Inch thickness. Its Interface Outer Diameter is 250mm/10 Inch. Screw Holes Diameter is 9.5mm/0.37 Inch. Screw Holes Distance is 290mm/11.4 Inch. Folded Edge Height: 20mm/0.8 Inch. Screws are not provided.