This clock was inspired by radioactivity - hence the name. The central core (the raw wood disk) symbolizes the atom that emits the particles all over the space. - Material: plywood (birch) - 6mm Owing to this naturalness small changes in color and pattern may occur compared to the images attached. - Manufacturing process: the central dial and the spikes of this particular clock are laser cut from a 6mm birch plywood board, after polishing the spikes are hand painted with 3 different shades of blue / turquoise (teal), then distributed evenly and clamped manually on the dial (see one but the last photo). The central disk remains untreated. Owing to the manual distribution process none of these clocks are identical. - The movement: is silent / non ticking - Battery requirement: 1pc. AA (not included in the package). - Hands: plastic (white) - Dimensions: diameter: 29cm / 11.5 in depth: 3,3cm / 1.25 in weight: 0,35kg / 0.8 lb - Production: 2-4 days - Shipping: ~1 week Feel free to request custom color schemes made just for you - contact us before placing the order. The 'Radium' models generally require at least 3 shades for the spikes in order to reach the organic look. Color customization costs no extra fee.