This is a posable, resin-cast kit of a science-fiction/anime item.
The "Arctic War" robots were designed by Nishimura Mitsutake of 324 ARTS!
Pentagon is part of the Robo Corps, just like Circle Face. He's more mobile and has a higher-performance engine than Circle Face, but the performance of his manipulators is not very good; as such, he's not suitable for work requiring much strength.
This resin assembly kit will be about 6cm tall when assembled, including his equipment (without the equipment, he's about 4.5cm tall). Please note that the images are of painted or CG versions of this kit; the markings shown on these images are not included.
[Figure Size]: Approximately 6cm tall after assembly (including equipment)