... 4)Advanced design 5)OEM & customer sample welcomed Spark plugs used for Automobile,Motorcycle,Yacht,Agricultural machine and other petrol ... plugs1x20ft: about 360,000-450,000pcs We produce spark plugs since 1992 now we produce 4.5 millions pieces every ... month. Spark plug Specification: Spark plugs used for Automobile,Motorcycle,Yacht,Agricultural machine and other petrol ...