Introduced in 1935, the Stuka became the most famous dive bomber of WWII and iconic for the air support part in the German Blitzkrieg strategy. If you want to learn more about the plane I recommend the Wikipedia article.
There has been several kits released over time in many versions. Most main manufacturers has a Stuka of some sort so it more depends on witch version you want to build. Here is an overview of the 1/48 kits released. Personally I'd go for Airfix 2017 release as they have very good quality kits lately. I have one in my stash but have not laid my hands on it yet.