The Bristol Blenheim was a fast day bomber designed for the RAF in the early to mid thirties. In its day, it was a fast, excellent aircraft. Unfortunately, its day was past when WWIl broke out. It was hopelessly outclassed by most modern fighters and was shot down in droves when un-escorted. It was quickly relegated to night intruder and naval strike missions and usage in less threatening environments. Despite attempts to upgrade it with new engines and other changes, it's performance remained sub-par and it was phased out as soon as was practicable.
This is one of Eduard's "Big Ed" sets that bundle all their PE sets and masks for a given kit in one package. In this case it consists of their exterior, interior, landing flaps and bomb bay PE sets as well as the mask set for the clear parts. If you bought them separately, they would cost a total of around $90, so you do save $25 buying them this way.