I design 3D printable objects in Sketchup and Rhino.
They can be printed in a variety of filaments from abs to carbon fibre.
The build volume on the desktop printer is 20 x 20 x 18 cm . However larger objects can be printed that exceed the build volume simply by slicing into as many pieces as required.
Prints are scalable and dimensionally accurate.
Extremely useful for prototyping small objects and supplementing traditional model making techniques