Thank you for viewing. Lens cap for Canon RF100-300mm F2.8 L IS USM, 112mm Although it's for the above lens, I was using it with my Sony FE 300mm F2.8 GM OSS (SEL300F28GM). This is a used item, so please refrain from purchasing if you are looking for a perfect condition or are overly concerned about details. (Search terms) Genuine Sony San-nippa (300mm f/2.8 lens)