This 87th scale set includes 9 different exhausts, 3 each of 5", 6" and 8" diameter pipes. 3 X curved tip, 3 X Miter Tip, and 3 bull horn type. Each set also has independant curved bottom pipes, so the builder can position the tips facing whatever direction they prefer. Lastly, the set includes six sets of exhaust stack shields, 3 plain, and 3 with holes, which fit the smallest of the exhaust stacks, the five inch. This set has passed the software checks for the detail materials, but should there be an issue, contact me via the shapeways designer link, or direct via email to modelmechanic@gmail.com .