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Speedline filling units for Parker Vacumatic fountain pens. Original Parker part. Available in standard or oversized. Unit A: Thread outer diameter is 0.375 inch Unit B: Thread outer diameter is 0.430 inch (Oversize) Unit C: Thread outer diameter is 0.397 inch (Oversize)
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🇺🇸 Ship from USA · On Agora since 2026
$40.00