Real world terminal blocks drawn to real world sizes. These terminal blocks are manufactured by States (https://www.statesproducts.com/product-terminal-blocks-list.php?bs=TB&pg=NT)
There are 6 different configurations in the Blender Collection ( from 4 to 10 terminals). These configurations are also available as triagulated STL meshes. There are 22 diffferent configurations in the Solidworks 2017 part file.
The Blender object use 5 simple materials (no UV maps, no images). The materials are: Black plastic, white plastic, translucent plastic, steel and shiny steel.
The number of vertices is dependent on the configuration. There are 161,850 vertices in the 4 pole configuration