(10) 1/2" Plastic Pipe Mandrels

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Set of (10) 1/2" Plastic Mandrels We recommend these for use with groups to speed the build time and make sure the paper rockets fit the launcher. Getting the correct fit between t he paper rocket and the launch tube is important. Too loose, and you loose performance, too tight, and your rocket may turn to "Confetti". These are 12" lengths of 1/2" plastic pipe the same diameter as the launch tube on the launcher. NOTE: These are used to form the paper templates to the proper size, they are not launched, and are reused. Show more