All layers of the Yin Yang figured wall clock are made of birch wood and there are 5 layers in total and the thickness of each layer is 4mm. The layers are coated with shiny polish and are smooth.It can change color depending on the angle of the light. Each layer is combined with each other and cannot be used separately. There is a protective and covering piece made of birch wood around the clock, it cannot be removed, there is no protective glass on the front of the clock. The hour and minute hands are handmade and covered with black oil paint and glossy varnish. The hour and minute hands are specially handmade and are in the shape of a bow and arrow.It is suitable for epoxy work. The clock mechanism is placed in a removable way and has a protection cover. There is a screw hole for fixing (in order for it to stand fixed and flat on the wall, you need to fit the screw etc. into the hanging space of the clock completely (the screw will fully enter the hole). The mechanism of the clock is silent (does not make ticking sounds)