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-
- diameter_outer_min = 10;
- diameter_outer_max = 12;
- height = 10;
- diameter_inner_min = 2.8;
- diameter_inner_max = 2.8;
-
- $fn = 20;
-
- difference() {
- cylinder(d1 = diameter_outer_max, d2 = diameter_outer_min, h = height);
- cylinder(d = diameter_inner_max, d2 = diameter_inner_min, h = height);
- }
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