4702 Drive Size: 5/8 in. MFG Model # (Series): 4702 Ground Electrode Tip Material: 0.7mm Platinum. Other Part Number: 2978, 127, 2687, 5547, 5874, 4793, 2215, 5555 OEM's Part Number: 4702. SKU: NDE:4702 Center Electrode Tip Material: 0.4mm Iridium.
Very impressed with these spark plugs and there precision. Will be able to tell more after I run them for a while. But all is good for now. Yes I would recommend them.