Each CAROLINE shelving unit is delivered with adjustable feet as standard. These can be adjusted via a thread for levelling and thus ensure a level stand. However, if the floor coverings have larger unevenness or a slope, you can order additional adjustable feet for height compensation of 15 - 40 mm separately as accessories. These have an outer diameter of 12 mm and can be ordered under the following link: https://www.caroline-system.com/de/caroline-system/verbindungen/zubehoerBefestigungs/2065/caroline-stellfuss-cr-sf-xl -oe-12-mm