1/2/3/5mm Trimmer Guide Comb Guard Shaver Attachment for Philips One Blade Razor

It's also very convenient, quick, and efficient to use. Easy to Clean: This beard cutting guide comb can be easily rinsed clean under the tap or washed with foam or shower gel. Four Size Options: With four guide combs (1/2/3/5mm), this product allows you to easily trim any length of hair on your face or beard, making it ideal for adding other lengths and styles while grooming.

eBay