Multiple Brand/manufacturer ?

In front end search, admin advanced search multiple pills can be assigned for search, but in admin product details page only single brand/manufacturer can be assigned for single product.

Is it possible to change this to multi select? Thing is I am not using this for actual manufacturer or brand but to describe style/shape of the product. Having one place (our-brands link) for all styles, having seo link for individual shape/style is very handy.