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- Capless rollerball refill
- Standard G2 ballpen refill size
- Allows use of water-based ink in retractable ball pens
Hugo Boss's EasyFlow ballpoint refill is a capless rollerball refill in the standard 'G2' DIN ISO 12757 shape used in the majority of retractable ball pens. The EasyFlow therefore gives the opportunity to convert any 'standard' ball pen to give a rollerball writing experience.