All new G² tips will now have an anti counterfeiting system. Each tip will come with its own S/N scratch off sticker as well as a QR barcode sticker. To verify if your tip is real, simply scratch off the S/N sticker to reveal your 12 digit S/N and either scan the QR code to access the Authenticity Query website or access it directly from our website. The Authenticity Query will tell you the diameter, hardness, as well as if it's a genuine G² tip or not.