1.1 This International Standard defines the mechanical properties, dimensional tolerances, surface finishes and technical delivery conditions of the following tubes and bores for pneumatic fluid power cylinders : — round non-ferrous metallic tubes, seamless or welded type, in the as-drawn stress-relieved or fully heat-treated condition; — bores, specially finished, with or without metal removal. 1.2 The tubes covered by this International Standard are intended for use as barrels in a wide variety of pneumatic cylinders. NOTE — Brass and aluminium have been considered as a basis in this document but should not be considered the only materials suitable for such applications. 1.3 Annex A specifies the dimensions and tolerances on inside diameters for non-ferrous metallic pneumatic cylinder tubes. 1.4 Annex B provides a recommended method of ordering.