Somewhat larger pyroclasts that range in size from small beads to walnuts are known as lapilli (“little stones”). These ejecta commonly called cinders (2-64 millimeters). Particles larger than 64 millimeters (2.5 inches) in diameter are called blocks when they are made of hardened lava and bombs when they are ejected as incandescent lava. Because bombs are semimolten upon ejection, they often take on a streamlined shape as they hurtle through the air. because of their size, bombs and blocks usually fall near the vent; however, they are occasionally propelled great distances. For instance, bombs 6 meters (20 feet) long and weighing about 200 tons were blown 600 meter s (2000 feet) from the vent during an eruption of the Japanese volcano Asama.