... metal, such as pt,pd rh.purifying of unburned air, CO,NOx, HC Our company boasts first class automobile exhaust catalyst ... also some local supplies, such as Yixin non-metal mechanical Co., Ltd. and Wangzi Ceramic Co.,Ltd.. We always use 400cpsi or 600cpsi for Euro ... standard. The light-off temperature is less than 250 for CO, HC and NOx. We have the technology for pt-pd ...