This is a model of an inline 6 cylinder engine block keychain.The model has been designed and optimized in terms of size and shape based on ergonomics and ease of use.The engine block is usually much taller but has been redesigned and adjusted in order to fit smoothly in our pocket.No supports required when printing.It is recomended that you print it with 0.15layer height because of the very delicate details that it features on the sides and it is also suggested to have the upper face of the block put on the build plate so that it can have the texture of the buildplate and make it stand out.
If you need any modification or if there is anything similar that you would like to have, please feel free to contact me and I can support you.