This is a Half banked Corner. The entry is 115mm wide expanding to a 75mm wide flat and a 75mm wide curved section leading to a 30 degree angle on the outside wall. The entry model needs to be printed twice once normally once mirrored along the x axis to act as an exit. there are a variety of corner models. From a short sharp 45 degree 115mm Inner radius corner to a 200mm inner radius 30 degree corner.