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NEW Nilfisk Hot Pressure WashersPressure WashersMachine Parts by BrandPumps & SparesPopular High Pressure HosesHose ReelsNozzlesPressure Washer TriggersUnloader ValvesInterpump Service KitsSuttner ST45 quick release coupling bodies with a 20mm diameter, which accept a matching ST45 plug. Versions include 3/8 and 1/2 inch female, 1/4 inch, 3/8 inch male, M22 male and M22 female threads, nickel plated brass couplings with blue or grey collars rated at 250 bar, and stainless steel 3/8 inch female couplings, one with EPDM seals.