Ceramic Foam Filter:Low-pressure loss,Various sizes, shapes and pore sizes are available. Ceramic Foam FilterOur ceramic foam filters (foamed ceramics) are ... steel , iron, bronze, copper, alloy and aluminum for preventing defects caused by oxides, dross, gas, slag ... requestsOur products advantage :Eliminates turbulence in the metal stream, Smoothes out metal flow, avoiding sprays, splatter and backset ...