oh - hey thanks. you're right, that info is on the image of the packaging itself. '0.4 mm line and 1.0 mm ball'. I was for some reason looking for this info in the product description. thanks so much for telling me about this, because i had no clue there were two different dimensions to look for.

Do you mind letting me know if this is the Pentel one you're referring to? Pentel slicci metallic pens. The pentel brand looked interesting to me. But I mostly saw pens that sparkled, and i was just looking for more regular ones like the g2s. . I couldn't find any called Metallic Grip, but this seemed to match more what you were talking about, but just wanted to make sure.