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 high impact polystyrene (PS).

• d1: 250 mm
• d2: 160 mm
• d3: 22 mm
• d4: 34 mm
• d5: 13 mm
• e1: 32 mm
• l1: 200 mm
• l2: 160 mm
• Winding volume: 4635 cm3
• Nominal weight: 950 gr.