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Continue to ChatASCO SCE353A811.24/50 - G3/4, Orifice Size 20mm, Threaded, Series 353 Dust Collector Power Pulse Valves https://www.valves-direct.com/product/asco-sce353a811-24-50-g3-4-orifice-size-20mm-threaded-series-353-dust-collector-power-pulse-valves/