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Anti-zipper for model rocketry — image 1

Anti-zipper for model rocketry

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This is used for model rocketry to prevent 3mm kevlar line from tearing cardboard tubes.

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Used in model rocketry to prevent “zippering” or tearing of cardboard tubes during parachute deployment. I printed in TPU. Not sure why you would want it to be rigid, but you could print with anything. I designed it to be used with 3mm kevlar cord.

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