Cooling tower pen holder / pencil holder(parametric)
thingiverse
Check out a bladed version at https://www.thingiverse.com/thing:6191316 While I liked and printed version of this from https://www.thingiverse.com/thing:2454444 and https://www.thingiverse.com/thing:277055 I found the centre a little too narrow for my liking. The result is this version of similar dmensions, with a more acute angle for the uprights. This slightly increases the diameter in the centre. As usual you can change and resize things as you wish. As with the original, this is a relatively long print, so be prepared to wait a while
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