This spool belongs to series which is normed from German rule "DIN 46399".
This particular reel is used in a lot of different markets; for example it's used to wind on steel wire, tin wire, fish filament, spark-erosion (EDM) wire, synthetic monofilament, enamelled copper wire, gold wire, precious chains, cables.
It's the economic version (also called "one way" or single use) made in only one piece, appreciated for its cheapness. The particular straight ribbing guarantee great flange resistance.
Usually produced in polypropylene (PP) obtained from industrial scraps in order to maintain low costs and reduce environmental footprint.

• d1: 200 mm
• d2: 125 mm
• d3: 22 mm
• d4: 34 mm
• d5: 13 mm
• e1: 32 mm
• l1: 200 mm
• l2: 128 mm
• Winding volume: 3062 cm3
• Nominal weight: 600 gr.

This item is available made in recycled plastic coming from packaging recycling too. The spool is certified "Plastic Second Life®, from plastic waste". More details on IPPR web-site: https://www.ippr.it/