NGK Code
There are many different types of glow plugs. They not only have different dimensions, but also differ in terms of the materials used and the glow properties.
The right glow plug for an application can be determined very easily by consulting the catalogue or the NGK online product finder.
Also, the standardized alpha-numeric code on NGK glow plugs helps you to identify every glow plug quickly and easily.
Now you can identify the NGK Glow Plug type (PDF-download).