Yet another way to grasp the principle visually is by making use of rulers or measuring tapes marked in millimeters. By observing these markings up near, you can begin to produce an knowledge of how modest 5mm certainly is in comparison with greater units like centimeters and inches. Air flow: https://geschaftssinn.de/ein-leitfaden-zur-auswahl-der-richtigen-5-mm-filz-meterware-fur-ihre-bastelanforderungen/