Tigerboy: Level/extrusion tester or reel for magnet wire and strings

Small leveling/extrusion test item; Test center or spread them over the printbed.
Simplify3d: Put many on the ground, then push center/arrange.

Outline dimensions:80*20mm, 1.2mm high
Holes: 3mm,1mm

You may use them as reel (Haspel) to store thin magnet wires, strings or small headphones.