This Robot B9 figure is released by Funko in their POP! x Lost in Space Series vinyl figure series.

Funko POP! is a crossover vinyl figure series by Funko and other famous franchises such as Disney, Pixar, DC Comics, Marvel Comics, Simpsons, South Park, Uglydoll, etc. Each POP! figure is about ~3" to ~5" tall and crafted in a Japanese anime/manga super-deformed style (NOTE: due to the unique design of each character, the actual size of the figures may be smaller or bigger than stated).

The POP! x Lost in Space series features characters from the 60's science fiction TV series that follows the adventures of a pioneering family of space colonists who struggle to survive in a strange and often hostile universe after their ship was sabotaged and thrown off course. Although the original concept (depicted in the unaired 1965 pilot episode) centered on the Robinson family, many later story lines focused primarily on Dr. Zachary Smith, played by Jonathan Harris. Smith and the Robot were both absent from the unaired pilot, as the addition of their characters was only decided upon once the series had been commissioned for production. Collect them all!