READY ASSEMBLED MECHANISM FOR EASY INSTALLATION Can be applied up to a diameter of 120 cm Can be applied up to a diameter of 70 to 120 cm Numbers are 7 cm long Hour hand: 13 cm Minute hand: 18 cm Mechanism 10 cm (Hung on a nail) Number Thickness 8 mm Material WOOD Mirrored Plexi (Not a Sticker - NON-DEFORMED DURABLE MATERIAL) Numbers stick (Quality Adhesive) Clock Mechanism: Silent sweep movement Special Design Laser Cut Hour and minute hands are metal. It works with 1 AA battery. Ready to Install. You can apply directly to the wall by removing the protector behind the pieces. There is also protective gelatin in front of the plexiglasses. You can use a damp cloth during cleaning.