... metal, such as pt,pd rh.purifying of unburned air, CO,NOx, HC Our company boasts first class automobile exhaust catalyst ... some local supplies, such as Yixin non-metal mechanical Co., Ltd. and Wangzi Ceramic Co.,Ltd.. We always use 400cpsi or 600cpsi for Euro ... Chinese local light-duty car manufacture such as Chery, Geely, Greatwall, SGMW etc. We also have export catalytic converter to other countries ...