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Design ID: 4591 |
Years in production: 1984 | Available Colours:  |
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.
![[1]](https://static.wikia.nocookie.net/lego/images/4/4f/Peeron_logo.png/revision/latest?cb=20110104203046){kind=logo}