It is a quite accurate model of a car's turbo unit. All of the parts should be easily press fited together. This model allows for use of 608 ball bearing which is placed beetween two housing parts. It allows the compressor and turbine wheel to spin freely adding to the realism of the model. If you happen to not own this exact bearing, there is aditional part model that you can print that will replace the bearing in it's function (the part is called: “PseudoBearing if you dont have one.stl”). Both compressor and turbine wheel have to be printed in 0.4 mm nozzle because the fins won't turn out properly. Moreover both of the wheels will only fit their corresponding housings. In 3mf file there is also additional stand for the turbo. There is also an option to print enclosed pieces of turbo housing. Happy printing:)