Source: https://www.amazon.com/Parker-Safety-Razor-SYNTHETIC-Bristle/product-reviews/B002LLQ3WK/ref=as_li_ss_tl?ie=UTF8&showViewpoints=1&sortBy=helpful&linkCode=sl2&tag=primandprep-20&linkId=ba816873a27a7db8e27b2f6f3681ff65