The LR7 is the Pentel Energel gel refill (known as the LR refill) in a 0.7 mm size. This is a bold, wet gel ink refill that will fit G2 rollerball pens, including any Pentel Energel. This refill is on the wide side so it will typically fit Japanese gel and rollerball pen bodies but not European ones. It is similar in size to a Pilot G2 refill.

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