This is a camera casing that zip ties on a 3 inch diameter rocket, and fits this camera (https://www.amazon.com/gp/product/B09N6S4L38/ref=ppx_yo_dt_b_search_asin_image?ie=UTF8&psc=1) to give you awesome onboard footage! Warning: Offsets center of gravity and center of pressure a lot!! will bend the rocket's flight path a lot!!