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Continue to ChatASCO SCS353A721.24/50-60 - Orifice Size 25mm, Quick Mount On Inlet & Oulet, Series 353 - ASCO Dust Collector Power Pulse Valves https://www.valves-direct.com/product/asco-scs353a721-24-50-60-orifice-size-25mm-quick-mount-on-inlet-oulet-series-353-asco-dust-collector-power-pulse-valves/