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This International Standard specifies information on the nominal outside diameters of rigid or semirigid tubing and nominal hose sizes to be used with hydraulic and pneumatic fluid power connectors and associated components: a) nominal outside diameters for rigid or semi-rigid tubes, irrespective of material composition, used in fluid power; b) a list of nominal sizes for hoses made of rubber or plastic used in fluid power. NOTE Actual outside diameters and tolerances for steel tubes can be found in ISO 3304 and ISO 3305; actual dimensions and tolerances for hose inside diameters can be found in ISO 1307.