Color (bright green) was nice, but when I screwed this down, tip wasn't straight. In other words, the tip must be horizontal and aligned with button, otherwise you have to tilt the pen. When this was on tight, the button on my pen was not at the top, which made it awkward. Stick with the round tips, because no matter where it lands once tightened, it will always be in the right position.
This is nice and is great for spiffing up your vapor stick, mine is burgundy and I added a white flat tip for Christmas.