They are ideal for attaching ducting to a wall or box and commonly used on Acoustic Box Fans.
METAL Wall Flange Ducting Connector Fans Hydroponics 4" 5" 6" 8" 10" & 12"
Metal Ducting Flange Spigot 4" to 12"
ABS Wall Flange Connector for Ventilation Pipe Air Ducting Connection Round
1Pcs Wall Flange Connector ABS-For Ventilation Pipe Air Ducting Connection Round
Ventilation Pipe Air Ducting Duct Joint Wall Flange Connector 100mm/125mm/150mm
ABS Wall Flange Connector Fit For Ventilation Pipe Air Ducting Connection Round/
