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Continue to ChatJOUCOMATIC 43400545 - 50mm Bore, Complete Trunnion MP2+(MP4), Series 438 - Isoclair Round Cylinder (Type CIS) https://www.valves-direct.com/product/joucomatic-43400545-50mm-bore-complete-trunnion-mp2mp4-series-438-isoclair-round-cylinder-type-cis/