... 100, 200, 300, 400,600pcsi Ceramic Substrate Catalyst is mainly used as the catalyst substrate and medium for heat exchange, and ... major material is composed of cordierite and stainless steel of iron, chrome and aluminium, usual hole density is 100pcsi, 200pcsi, 300pcsi ... )to reach European norm 2, 3 and 4 emssion standard. (Used In Vehicle) 400cells per square inch specification (mm) volume (litre ...