Every other 510 tip I've got of this style, both Delrin and Acrylic, has an opening that this too small to be ideal for dripping. There's nothing special about this tip on the surface, but the heat tolerance and durability of Delrin is unmatched. This one is super smooth and very high quality. It's a perfect fit too! Had I known this before I bought it, I would've went ahead and ordered the white one with it. Try Delrin if you haven't. You WILL taste the difference!