I imagine you could probably just find plastic tubes of the correct diameter and cut a slit out of them. This doesnt seem like something you would 3d print
As I say, I want something I've designed, rather than just a piece of plastic. Pure form; unavoidable function.
@BBBRPDL started
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I imagine you could probably just find plastic tubes of the correct diameter and cut a slit out of them. This doesnt seem like something you would 3d print