This International Standard specifies the principal dimensions, tolerances and designation of drop wires for mechanical, electromechanical and electrical warp stop motions for wearing machines. This International Standard applies only to drop wires that are drawn in by hand or pinned by means of a pinning machine. It applies to the following types of drop wires: a) for mechanical and electromechanical warp stop motions — MG (closed end) — MO (open end) b) for electrical warp stop motions — EG (closed end) — EO (open end)