Handy spacers on a Sprue: 3mm ID, 5mm OD, 3mm height

Set this up because I often find myself needing spacers for mounting electronics. It's handy to print a few of these to have spacers around. They print well - much better than individual spacers in a pattern. The matrix of the sprue adds stick-down-to-print-surface strength.

Printed with 90% infill. I'm printing PETG on glass with hair spray for an adhesion component. Took about 15 minutes. Cut or twist spacers off the sprue to use, toss the rest into a desk drawer for spares.

Scale to any appropriate size and height for your needs.