This is corporate surplus in new Old Stock NOS condition. This is a Lot of 2 Ceramic 4″ White Discs. Manufactured by: Unknown. Dimensions / Measurements: Diameter : 4″ Thickness : 1/4″ or 0.25″ These could be used for many things, coasters, trivets, hot late / pan counter protectors, science experiments, crafting, tiling a wall or something.