Normas ISO

Tools for pressing -- Guide pillars-- Part 2: Type A, straight pillars

Tools for pressing -- Guide pillars-- Part 1: Types

Black leads for wood-cased pencils -- Classification and diameters

Mechanical pencils-- Part 2: Black leads -- Classification and dimensions

Mechanical pencils-- Part 1: Classification, dimensions, performance requirements and testing

Tubular tips for hand-held technical pens using India ink on tracing paper-- Part 1: Definitions, dimensions, designation and marking