The EW-53B Lens Hood from Canon is designed specifically for use with Canon's RF-S 10-18mm f/4.5-6.3 IS STM lens and prevents stray light from entering its front element. This lens hood also gives the added benefit of upholding the lens's glass quality by protecting it from unintentional impact.
★★★★★ Perfect fit for my RF-S 10-18mm lens. It blocks stray light well and gives me peace of mind protecting the front element. Excellent genuine Canon quality.