We use both metric and english placing concrete forms, materials and anchoring device's listed in our blueprints. 1" is 25mm. 1/4" is 6mm. Easy right! It's all based on 10's. Alot of materials imported are already measured and shipped via metric system. 100mm equals 4 inches. A 4'x 8' sheet of material would be ---2400mm x 4800mm (close to it.) Now this is a slight variation in conversions and this is not an exact formula but it's close just to give a general idea of size. 16mm is 5/8th's of an inch-
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