Optical Illusions Geometric Wall Clock The clock is lasercut from Matte clear black acrylic 3mm thick. Our clock movements are Sweep (Silent - Non Ticking) and RoHS Approved with 1 Year Guarantee. To avoid damage problem and for safety purpose Clock hands can be assemble by the customer. Now you think that how to assembling clock hands???? Wait....The Instruction notes included with packing which helps you to assemble the clock hands properly. Hanging screw & Cleaning Cloth Included. / Product code : OSWA0201A1A