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Eaton Cutler-Hammer E22B2 Contact block 320788-704 What are the maximum pressureThe Eaton Cutler Hammer E22B2 is a heavy duty, 1 NO (Normally Open) contact block designed for industrial pilot device applications. Engineered for the 22. 5 mm E22 series pushbuttons and selectors, this base mounted contact block features high conductivity silver nickel contacts that ensure reliable low level circuit switching and long term electrical durability in high cycle environments. The stackable design allows for flexible configuration,