The Parker Quink Gel is a refill that is sold in some versions of the Jotter pen as well as a stand-alone refill.
The Pierre Cardin Roller Gel is a Parker-style G2 pen refill that uses gel ink. Despite the name it is not a rollerball refill.
The Kaweco Sport Gel Roller is a Parker-style pen refill that uses gel ink.
The OHTO Flash Dry Gel pen refill is a top-rated gel refill in the Parker-style G2 size. This is one of a small number of needle-tip refills in this shape.
The Itoya Quick-Dry is a gel pen refill in the G2 size. It’s known for being one of the few needletip refills sold in Parker-style pens.
The Tombow BK-LP03 Rollerball Pen Refill is a liquid rollerball refill that is designed to work with Tombow pens, like the Zoom 505.
The Tombow BK-LP05 Rollerball Pen Refill is a liquid rollerball refill that is designed to work with Tombow pens, mainly the Zoom 505.
The Tombow BK-LP07 Rollerball Pen Refill is a liquid rollerball refill that is designed to work with Tombow pens, like the Zoom 505.
The Pilot Petit1 mini fountain pen use custom ink cartridges that are like a smaller, capsule-shaped version of Pilot’s normal fountain pen refills.
The Uni-ball UMR-85E is the gel ink refill found in the Uni-ball Signo 307. It is the 0.5 mm version of the UMR-87E.
The Uni-ball UMR-83E is the 0.38 mm gel ink refill sold in the Uni-ball Signo 307 pen.
The Uni-ball Signo 207 Retractable Gel Pen Refill is the refill used by the a number of popular Uni-ball gel pens.