> For the complete documentation index, see [llms.txt](https://manual.karamba3d.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://manual.karamba3d.com/3-in-depth-component-reference/3.1-model/3.1.16-select-elements.md).

# 3.1.14: Select Elements

Use the **“Select Elements”** component to filter elements based on specific properties. The selected elements can then be used to retrieve results, calculate their mass, surface area, volume, or generate meshes (see the **“Element Query”** component). 

Fig. 3.1.14.1 shows how this works: the input plugs **“ElemIds”**, **“Colors”**, **“CrosSecs”**, **“Materials”**, **“LenInter”**, and **“ElemTypes”** can be supplied with lists of element identifiers, colors, cross sections, materials, length intervals, and type indexes. The values in each input plug form criteria via **“OR”**. For example, in Fig. 3.1.14.1, the selected elements may be either purple or red. The individual input plugs are connected via **“AND”**: in the image below, the selected element must be named **“Membrane\_D”**, be red or purple, and be either a membrane or shell, and so on.

For shells and membranes, the length refers to the diagonal of their axis-aligned bounding box. For 1-D elements, it is simply their length. The element types are indexed starting with zero. Right-click on the component icon and select **“Expand ValueLists”** to make the value-list input appear.

 

![Fig. 3.1.14.1: Selection of elements via identifiers, colors, cross sections, materials, size and type.](/files/-MjnvMuPa9Cmg61MWDsx)

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