READY ASSEMBLED MECHANISM FOR EASY ASSEMBLY Can be applied up to a diameter of 120 cm Can be applied up to a diameter of 70 to 120 cm Numbers are 10 cm long Hour hand: 30 cm Minute hand: 38 cm The mechanism is hung on a nail. Number Thickness 4 mm Material Mirrored Plexi (NON-DEFORMABLE 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. The bottom bracket is ready-assembled. You can apply it to the wall by removing the protector behind the parts. There is also protective gelatin in front of the plexiglasses. You can use a damp cloth during cleaning.