This furniture must be fixed to the wall with the enclosed wall fastener. Different wall materials require different types of fixing devices. Use fixing devices suitable for the walls in your home, sold separately. 1 fixed shelf and 4 adjustable shelves included. Min. ceiling height required: 205 cm. May be completed with BILLY height extension unit in the same width for added storage vertically. May be completed with BILLY corner fitting to form a stable corner unit. Can be used on the corner unit only if the shelf next to it has no doors. Handle with care! A damaged edge or scratched surface can cause the glass to suddenly crack and/or break. Avoid collisions from the side – this is where the glass is most vulnerable. The door does not fit bookcases purchased in the spring of 2014 or earlier.