I ordered a double-walled tip and got a round tip. It had the correct part number written on it in white pen, but it was clearly the wrong part. I'm still waiting for Amazon to refund my money for the return shipping. It could mean something about the manufacturer's quality control standards if they allow a part to be mislabeled. I will also say that the picture is not an accurate representation of the product they are selling as these tips actually have a heavily textured finish rather than the smooth black finish shown in the photo. The tip also has a large "MBRP" stamp embossed on both sides of the tip, which is also not visible in the picture. A bit misleading and at this price I would probably choose something else next time.