Simple Tripod bubble level to be trapped between tripod and image device. I specifically designed this component to be used with my Samsung Gear 360 and a monopod + stand to provide a guide towards the level of the tripod setup. The level can still be used with a standard camera if radial clearance allows. This is not perceived to be an accurate\precision aid to levelling. It helps greatly to have a guide when taking panoramic images. You can find the Bubble vials on Amazon:- Link: https://www.amazon.co.uk/gp/product/B01IR5IORU/ref=oh_aui_search_detailpage?ie=UTF8&psc=1