Ceramic honeycomb filter Materail: mullite. Mullite ceramic honeycomb filter have straight holes, more strongth compare to ceramic foam filter. Apply to iron, copper, copper, steel, stainless steel foundry. Function: 1. Can remove big oxide, 2. Calm down turbulent laminar flow, 3. Absorb smaller impurities with it's myriad eyelets whicn only been found in microscope Specification: Al2o3: 50% Hole type: square/round/triangle Millihole: 2--3 um Coefficient of thermal expansion: less than 4.0 Refractoriness: 1700 dgree celsius Bending strength at normal temperature Formal size: 50*50*12.5mm, 50*75*12.5mm, 100*75*12.5mm. Size can be changed according your requirements. Standard export packing