About This

EXTEND THE LIFE OF YOUR FAVORITE PENS – Keep your Rubyloo dog pens writing strong with this 10-pack of black ink refills, no need to toss them when the jokes or ink run out!
SMOOTH, RELIABLE WRITING PERFORMANCE – Enjoy effortless, everyday writing with ink that flows smoothly, dries quickly, and doesn't smudge or skip—perfect for notes, lists, and scribbles.
EASY TO INSTALL, MESS-FREE REFILLS – Simply unscrew your pen, pop in the refill, and get back to writing—no special tools, no frustration, no leaking. Just click and go!
VALUE PACK FOR PEN LOVERS – Includes 10 black ink ballpoint refills—great for keeping your full Rubyloo pen set stocked and ready whether at home, in the office, or on-the-go.
A SMART, ECO-FRIENDLY UPGRADE – Refill, don’t replace! These cartridges help reduce waste and make your favorite dog pens a smarter, longer-lasting writing companion.

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