4mm to 20mm Step Mandrels

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4mm_6mm_8mm_10mm_12mm_14mm_16mm_18mm_20mm - Step Mandrels Mandrel 1 steps up from a 4mm Circumference to a 6mm Circumference, then continues to an 8mm Circumference. Mandrel 2 jumps from a 10mm Circumference to a 12mm Circumference and ends at a 14mm Circumference. Mandrel 3 starts at a 16mm Circumference and steps up to a 18mm Circumference, then finishes with a 20mm Circumference. Each Mandrel is 150mm tall. Perfect for 3D Metal Model Building like Metal Earth and Piececool brands. Print the even numbers in one color, odd numbers in another. Print them at a 50% infill level. I'll be adding more designs regularly, so keep checking back.