Wire Type IQI as per EN 462-1
This type of IQI consists of a series of metal wires mounted in a flexible plastic holder. The wires are mounted parallel to each other about 5 mm apart and are each about 60 mm long. The standard models consist of three series, each containing seven wires, numbered 1 to 7, 6 to 12 and 10 to 16. Published by the European committee for standardization; EN-462-1 replaces the 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.