Thank you for viewing. This is a tripod mount for the FUJIFILM super-telephoto lens XF100-400mm. The original mount was small and inconvenient for carrying and using with a tripod, but this one is just the right size. I purchased it and used it a few times, and it appears to be in relatively good condition. *Please understand that this is a used item, and we appreciate your purchase. *Basically, no returns or exchanges are accepted. *We are also listing this item elsewhere, so please understand that it may be out of stock.