EN 462-1 published by European committee for standardization; EN 462-1 replaces DIN 54.109.
Based on a series of wire diameters, subdivided into ranges of 7 wires. The lead symbol identifies the largest wire, material and "EN" specification.
EN 462-1 IQI’s are available in Steel, Aluminum and Copper in sizes; 1 EN, 6 EN, 10 EN, and 13 EN, and Titanium in sizes 6 EN, and 10 EN
These penetrameters are encapsulated in vinyl for durability.