Your add offered two types of Shick injector blades: the ordinary kind which do not last as long, and are not as smooth in operation, and the Chromium Plus variety, which are excellent and a true treasure when they are available. I ordered the Chromium Plus blades and received the ordinary ones. I wrote to complain using the designated e-mail address, and I have yet to hear one word from your company in response to that complaint. Since injector blades of any kind are difficult to find, I will keep these, and when I must, use them, but I will be on the lookout for Chromium Plus blades from a more reliable vendor.