... :Exhaust system assembly series: can be used for automobile electronic igniter, exhaust gas/purifier/heater/muffler/aire intake pipe/down pipe/tips, strut ... dryer, warming appliance, electric warmer, etcIndustrial Series: can be used for water heater, industrial electric furance, far infrared ray device, boiler, heating ... .10-0.20 ±0.008 >3.00-5.50 ±0.04>0.20-0.30 ±0.010 >5.50-7.50 ...