They are ideal for attaching ducting to a wall or box and commonly used on acoustic box fan.
Metal Ducting Wall Flange Spigot 4" to 12"
METAL Wall Flange Ducting Connector Fans Hydroponics 4" 5" 6" 8" 10" & 12"
Metal Ducting Reducers - 4" 5" 6" 8" 10" 12 Inch For Fans & Ducting Hydroponics
Metal Ducting Reducers All Sizes Available
Metal Ducting 90 Degree Bend 4" to 12"
Various Suspension Support Split Clip Bracket, Rubber Liner Spiral Metal Ducting
