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Continue to ChatASCO SCE353A821.230/50 - G1, Orifice Size 25mm, Threaded, Series 353 Dust Collector Power Pulse Valves https://www.valves-direct.com/product/asco-sce353a821-230-50-g1-orifice-size-25mm-threaded-series-353-dust-collector-power-pulse-valves/