Billy Bookcase extenders (Llantrisant CF72)

Billy bookcase from IKEA, oak effect veneer. These are to extend the height of existing Billy bookcase units by an extra shelf. All are 35 cm high, and 28 cm deep. The larger is 80 cm long; the others 40 cm long. They are in very good condition. The new location of our Billy bookcases is in a low ceilinged room, so the extenders no longer fit.