Mirrorcle’s MEMS mirror product requires prior research and going over various documents to come up with a precise part number. It’s not an easy task, which need some experience and pin point accuracy . Each MEMS mirror is made-to-order and assembled upon acceptance of order. Once its confirmed, it cannot be undone. Please take some time to study the Mirrorcle product guide as below, or link, to ensure you make no mistake when ordering MEMS mirror.