The Metal Earth Transformers models are amazingly detailed etched models that are fun and satisfying to assemble. Each model starts out as 4" square metal sheets and you simply pop out the pieces and follow the included directions to assemble your model. Optimus Prime lays his life on the line in the defense of his adopted world. Every action he takes, and every modification he makes to his formidable body, is done to protect Earth. Optimus Prime is usually depicted as having risen up from the lowly worker to become a champion in gladiatorial combat. Details: Silver 1.77" x 1.22" x 3.46" assembled size Expert difficulty level Ages 14 and up Contents: 2 square metal sheets (4" x 4" each) Illustrated instruction sheet