Geodreieck cm 16 This technical drawing set square includes a protractor in addition to the classic decimeter. This allows for the measurement of angles and the determination of perspective lines in drawing. Solid, Transparent, and 100% Bio-compostable The Green Choice Choose responsibly products that do not pollute. Our products are the result of eco-sustainable ingenuity and are 100% environmentally friendly. PLA is a plastic made from corn (non-edible) and is completely biocompatible; at the end of its life, it should be disposed of in organic waste as if it were food. It does not release pollutants or microplastics, which are the biggest problem of invisible pollution on the planet. Microplastics are ingested by marine creatures and consequently also by humans, poisoning themselves by eating fish. PLA: This plastic becomes an inert fertilizer for agriculture.