The Ozone Probe 2-Stage Water Rocket / Pop Bottle Rocket Only comes with all the precision finished components shown above. It doesn't include the launcher, guide
rod or red visibility marker. Get it as a spare rocket or get many of them for a group activity. You will need to provide a 2-liter plastic pop bottle and an
air pump of your own, or you can get an exceptionally good quality bottle and pump from the AntiGravity web store.