I bought Gillette fusion razor blades from Amazon. blades arrived in unmarked boxes, the inside packaging lacked barcode, information on was in Spanish, inside packages were not sealed. Blades looked different from the originals, bought from Costco: rubber strip and color of the cartige itself. Amazon listing address:
https://www.amazon.com/gp/product/B004B***H0/ I am attaching side-by-side image: on left original, on right my purchase.