Source: https://www.amazon.com/Merkur-Platinum-Blades-Standard-Double/dp/B01M712V20/ref=as_li_ss_tl?ie=UTF8&qid=1518122409&sr=8-3&keywords=Merkur+Razor+blades&linkCode=sl1&tag=primandprep-20&linkId=3e11ebc1146edfcaeac94f4ac6d6d681