Thank you for viewing. I am selling this item because I accidentally purchased it. Two-piece set of 16mm and 11mm adapters (intermediate rings) for Canon RF mount. - Model: JJC RF Mount 16mm & 11mm - Type: Mount Adapter - For Canon RF mount - Quantity: Set of 2 - Color: Black - Included items: Front cap, rear cap, case I opened the package once to take photos for the listing, but it is basically as good as new. Please forgive me if I have overlooked anything. Immediate purchase is possible. Please understand that the person who purchases directly first will be given priority.