Pentel Standard Brush Pen Refill - Gray Ink

Pentel Refill(Gray Body with Water-based Waterproof Black Ink)

To put it simply: Awesome Black Ink! It dries as soon as it gets on the paper and doesn't run(it will if you constantly wash/rub/brush over it with water),BUT it's pretty waterproof! Get this refill if you plan on using the Pentel Standard Brush Pen as one of your primary tools!
So to close this short review: Looking for an ink refill that's black, dries fast, and waterproof? BUY THIS!!!!!!

Cheap, easy to reload... What's not to love?

It's taken me forever to even get to using this, but it's easy to install in the brushpen and works perfectly!