Part 4591

Part 4591, the 2x2 Fin Brick is a cylindrical brick that was introduced with Classic Space in 1984 and phased out in 1996. In most cases they were used as the rear end of a rocket. It was most common in black and white, but also came in grey, red and, once, blue (in 6951 Robot Command Centre). The piece has an axle hole in the centre.
== External Links ==
Category:Parts
Category:Parts introduced in 1984
Category:LEGO Digital Designer parts