3dRose dpp_164891_2 Pi Symbol Math Sign. Mathematical Black and White Mathematics Number-Wall Clock, 13 by 13-Inch Dimensions (in inches): 13 h x 13 w x 0.1 D High gloss mirror like finish, UV coated, scratch resistant aluminum; suitable for moist environment Silent uncovered quartz mechanism; Requires one aa battery (not included) Gold colored hour, minute and second hands Numbers are printed as part of the image