Taytools 4 Inch OD Self Cleaning No Clog Aluminum Blast Gate Cut Off Valve for Dust Collection System ABG4

Features :

• Will fit 4″ diameter hose or ducts
• Direct air flow to exactly where you need it and maximize dust extraction by opening and closing select ducts
• Open slot at back to for self-cleaning, no-clog operation
• Cast aluminum, steel sliding gate, locking knob