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Continue to ChatJOUCOMATIC 43400027 - 100mm Bore, Rear Male Trunnion MP4, Series 436 Heavy Duty Cylinders (Type PIS) https://www.valves-direct.com/product/joucomatic-43400027-100mm-bore-rear-male-trunnion-mp4-series-436-heavy-duty-cylinders-type-pis/