This is a CO2 racer designed to take in a small CO2 cartridge in the rear of the car. If your printer is less than 12" then you would use the split version of the racer. The parts you will need-outside of a 3D printer and about 150 grams of filament-is 1/8" axles (steel rods) and a race track to race the car on. If you split your print up then the axles will also be used to slip the part together. Washers in between the wheels and body are optional but do help. Finally a hole is put through the front of the car to weave a string through the body.