Review on 💨 Maximize Efficiency with POWERTEC 70108 4 Inch Blast Gate for Dust Collector/Vacuum Fittings by Christopher Shavers

I bought six and for the price I would buy again; but they don't seal very well, and the plastic holding the two molds (the parts that don't move) isn't even fused together on most of the ones supplied. Even with the manifold running, you can hear air whistling through these things when it's closed. Hooked up to 4" PVC 40 and with a few turns of duct tape it's in place (not without). If you have a spare roll of duct tape, have a little patience, don't want to spend a ton of money on better blast gates and agree that you will need them in the future probably need replacing if they fall apart well worth those few bucks they will set you back quality however.