This Part of EN 10305 specifies the technical delivery conditions for welded cold sized steel tubes of circular cross section for precision applications. NOTE This Part of EN 10305 may also be applicable to non-circular (excluding square and rectangular) cross sections. Tubes according to this Part of EN 10305 are characterized by having precisely defined tolerances on dimensions and a specified surface roughness. Typical fields of application are in the vehicle, furniture and general engineering industries.