Electrode Material:Normal Origin:Mainland China Category:Spark Plug Material:Metal + Ceramic Model: D8TC:D8TC&A7TC Package:1*spark plug Descripcin Three-sided electrode. Multi-side electrode spark plugs have multiple spark channels for longer life and improved ignition reliability compared to single-side electrode spark plugs. Specification Material: Metal + Ceramic Model: A7TC Overall length: 6.5cm Thread diameter: 10 mm Thread length: 12 mm Corresponding models: A7TDI, A7RTC, C7HSA, CR7HSACR6HSA, C6HSA, CR7HGP, Champion Spark Plug Z9Y Model: D8TC Overall length: 7.5cm Thread Diameter: 12mm Thread Length: 19mm Corresponding models: D8EA, D8RC, DR8 EA, D7EAD8TC, DR8EGP, DPR8EA-9, DPR8EIX-9 NJW: D7REC2, DR8VX, DR7EA, D8RTC Champion A8YC, P-RA7HC, Torch T2197 Package Includes: 1*spark plug Note: You can measure the size of the old spark plugs, or look at the model number on the old spark plugs to determine the model you need to buy