Check the listing for details. R-4D decal sheet only, 1:1 Scale. Condition: New. Listed at 7.99 USD. The attitude control (steering, also called RCS) engines that made travel to the Moon possible! This is is the decal sheet only for this model. If you need the complete kit, find it here: https://www.ebay.com/itm/30395068499216 of these were used on every Apollo Lunar Module, and 16 more on the Apollo Service Module, allowing these craft to move and rotate in any direction. These are the small engines you see on each corner of the Lunar module. Each had a thrust of around 100 pounds. Full-color, full-scale self-adhesive decals printed on silver paper. The red and green decals are 3/4" X 3.5" and the black decals are 1/4" wide. (Decals are not die- cut; you'll need to carefully cut them out.) These are not available anywhere else; they are my own design based on photos of the real thing.