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wow, sorry for the late response, that's one really cool ring box! pretty cool!cheers!
Hi, it will depend on the thickness of the leaves, when closing the iris, the leaves overlap with each other. In this case, the thickness of each leaf is 0,1 mm. When fully closed, the 12 leaves sum 1,2mm thick in the center. This causes the leaves to bend inward a little bit. So the thicker the blades, more force will be needed to bend the leaves in order to overlap with each other, sometimes making it impossible to fully close after some point.Cheers!
head in a jar prank
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